diff --git a/Assets/Samples/LeaderboardsDemo/Scenes/LeaderboardsDemo.unity b/Assets/Samples/LeaderboardsDemo/Scenes/LeaderboardsDemo.unity
index d3e9996..88114d4 100644
--- a/Assets/Samples/LeaderboardsDemo/Scenes/LeaderboardsDemo.unity
+++ b/Assets/Samples/LeaderboardsDemo/Scenes/LeaderboardsDemo.unity
@@ -184,7 +184,7 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 5d32f5ae2f5f7495cb77f079a21c54b0, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  leaderboardName: test-leaderboard
+  leaderboardName: team-scores
 --- !u!1 &497470367
 GameObject:
   m_ObjectHideFlags: 0
diff --git a/Assets/Samples/LeaderboardsDemo/Scripts/LeaderboardUIController.cs b/Assets/Samples/LeaderboardsDemo/Scripts/LeaderboardUIController.cs
index b6a01ff..ffbf8b5 100644
--- a/Assets/Samples/LeaderboardsDemo/Scripts/LeaderboardUIController.cs
+++ b/Assets/Samples/LeaderboardsDemo/Scripts/LeaderboardUIController.cs
@@ -1,9 +1,9 @@
 using UnityEngine;
 using TaloGameServices;
 using UnityEngine.UIElements;
-using System.Collections.Generic;
 using System.Threading.Tasks;
-using System.Linq;
+using System;
+using System.Collections.Generic;
 
 public class LeaderboardUIController : MonoBehaviour
 {
@@ -13,17 +13,21 @@ public class LeaderboardUIController : MonoBehaviour
     private ListView entriesList;
     private Label infoLabel;
 
+    private int filterIdx;
+    private string filter = "All";
+
     private async void Start()
     {
         root = GetComponent<UIDocument>().rootVisualElement;
         root.Q<Button>("post-btn").clicked += OnPostClick;
+        root.Q<Button>("filter-btn").clicked += OnFilterClick;
 
         entriesList = root.Q<ListView>();
         infoLabel = root.Q<Label>("info");
 
         if (string.IsNullOrEmpty(leaderboardName))
         {
-            throw new System.Exception("Please create a leaderboard and set the leaderboard name to its internal name");
+            throw new Exception("Please create a leaderboard and set the leaderboard name to its internal name");
         }
 
         await LoadEntries();
@@ -32,12 +36,17 @@ private async void Start()
     private async void OnPostClick()
     {
         var username = root.Q<TextField>().text;
-        await Talo.Players.Identify("username", username);
+        var score = UnityEngine.Random.Range(0, 100);
+        var team = UnityEngine.Random.Range(0, 2) == 0 ? "Blue" : "Red";
 
-        var score = Random.Range(0, 100);
-        (LeaderboardEntry entry, bool updated) = await Talo.Leaderboards.AddEntry(leaderboardName, score);
+        await Talo.Players.Identify("username", username);
+        (LeaderboardEntry entry, bool updated) = await Talo.Leaderboards.AddEntry(
+            leaderboardName,
+            score,
+            ("team", team)
+        );
 
-        infoLabel.text = $"You scored {score}.";
+        infoLabel.text = $"You scored {score} for the {team} team.";
         if (updated) infoLabel.text += " Your highscore was updated!";
 
         entriesList.Rebuild();
@@ -62,9 +71,26 @@ private async Task LoadEntries()
 
         do
         {
-            var res = await Talo.Leaderboards.GetEntries(leaderboardName, page);
-            page++;
-            done = res.isLastPage;
+            try
+            {
+                var res = await Talo.Leaderboards.GetEntries(leaderboardName, page);
+                page++;
+                done = res.isLastPage;
+            }
+            catch (RequestException e)
+            {
+                if (e.responseCode == 404)
+                {
+                    infoLabel.text = $"Failed loading leaderboard {leaderboardName}. Does it exist?";
+                }
+                else
+                {
+                    infoLabel.text = e.Message;
+                    Debug.LogError(e);
+                }
+                return;
+            }
+
         } while (!done);
         
         HandleListVisibility();
@@ -78,13 +104,38 @@ private async Task LoadEntries()
             return label;
         };
 
-        var entries = Talo.Leaderboards.GetCachedEntries(leaderboardName);
-
         entriesList.bindItem = (e, i) =>
         {
-            e.Q<Label>().text = $"{i+1}. {entries[i].playerAlias.identifier} - {entries[i].score}";
+            LeaderboardEntry entry = entriesList.itemsSource[i] as LeaderboardEntry;
+            e.Q<Label>().text = $"{i+1}. {entry.playerAlias.identifier} - {entry.score} ({entry.GetProp("team", "No")} team)";
         };
 
-        entriesList.itemsSource = entries;
+        entriesList.itemsSource = Talo.Leaderboards.GetCachedEntries(leaderboardName);
+    }
+
+    private string GetNextFilter(int idx)
+    {
+        return new [] { "All", "Blue", "Red" } [idx % 3];
+    }
+
+    private void OnFilterClick()
+    {
+        filterIdx++;
+        filter = GetNextFilter(filterIdx);
+
+        infoLabel.text = $"Filtering on {filter.ToLower()}";
+        root.Q<Button>("filter-btn").text = $"{GetNextFilter(filterIdx + 1)} team scores";
+
+        if (filter == "All")
+        {
+            entriesList.itemsSource = Talo.Leaderboards.GetCachedEntries(leaderboardName);
+        }
+        else
+        {
+            entriesList.itemsSource = new List<LeaderboardEntry>(Talo.Leaderboards.GetCachedEntries(leaderboardName)
+                .FindAll((e) => e.GetProp("team", "") == filter));
+        }
+
+        entriesList.Rebuild();
     }
 }
diff --git a/Assets/Samples/LeaderboardsDemo/UI/LeaderboardUI.uxml b/Assets/Samples/LeaderboardsDemo/UI/LeaderboardUI.uxml
index a5c6fb9..f3c2a4f 100644
--- a/Assets/Samples/LeaderboardsDemo/UI/LeaderboardUI.uxml
+++ b/Assets/Samples/LeaderboardsDemo/UI/LeaderboardUI.uxml
@@ -7,6 +7,7 @@
             <ui:VisualElement style="flex-direction: column; margin-top: 16px;">
                 <ui:TextField picking-mode="Ignore" text="Username" name="username" />
                 <ui:Button text="Add entry" display-tooltip-when-elided="true" name="post-btn" />
+                <ui:Button text="Blue team scores" display-tooltip-when-elided="true" name="filter-btn" />
             </ui:VisualElement>
         </ui:VisualElement>
     </ui:VisualElement>
diff --git a/Assets/Samples/Playground/Scenes/Playground.unity b/Assets/Samples/Playground/Scenes/Playground.unity
index c8398b0..8e53d55 100644
--- a/Assets/Samples/Playground/Scenes/Playground.unity
+++ b/Assets/Samples/Playground/Scenes/Playground.unity
@@ -156,6 +156,7 @@ RectTransform:
   - {fileID: 1989410051}
   - {fileID: 41042924}
   - {fileID: 1810825303}
+  - {fileID: 1484174634}
   m_Father: {fileID: 2079681527}
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
@@ -343,7 +344,7 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 3d636da22b3489748bdd853bf34f6a83, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  service: steam
+  service: username
   identifier: 123456
 --- !u!1 &66918959
 GameObject:
@@ -3086,6 +3087,153 @@ CanvasRenderer:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1454318102}
   m_CullTransparentMesh: 1
+--- !u!1 &1484174633
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 1484174634}
+  - component: {fileID: 1484174638}
+  - component: {fileID: 1484174637}
+  - component: {fileID: 1484174636}
+  - component: {fileID: 1484174635}
+  m_Layer: 5
+  m_Name: Delete Prop
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!224 &1484174634
+RectTransform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1484174633}
+  m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children:
+  - {fileID: 1720564333}
+  m_Father: {fileID: 13014977}
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+  m_AnchorMin: {x: 0, y: 0}
+  m_AnchorMax: {x: 0, y: 0}
+  m_AnchoredPosition: {x: 0, y: 0}
+  m_SizeDelta: {x: 0, y: 30}
+  m_Pivot: {x: 0.5, y: 0.5}
+--- !u!114 &1484174635
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1484174633}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 9b13150b0c4504a3fa9f48302235223a, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  key: currentHealth
+--- !u!114 &1484174636
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1484174633}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 4e29b1a8efbd4b44bb3f3716e73f07ff, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_Navigation:
+    m_Mode: 3
+    m_WrapAround: 0
+    m_SelectOnUp: {fileID: 0}
+    m_SelectOnDown: {fileID: 0}
+    m_SelectOnLeft: {fileID: 0}
+    m_SelectOnRight: {fileID: 0}
+  m_Transition: 1
+  m_Colors:
+    m_NormalColor: {r: 1, g: 1, b: 1, a: 1}
+    m_HighlightedColor: {r: 0.9607843, g: 0.9607843, b: 0.9607843, a: 1}
+    m_PressedColor: {r: 0.78431374, g: 0.78431374, b: 0.78431374, a: 1}
+    m_SelectedColor: {r: 0.9607843, g: 0.9607843, b: 0.9607843, a: 1}
+    m_DisabledColor: {r: 0.78431374, g: 0.78431374, b: 0.78431374, a: 0.5019608}
+    m_ColorMultiplier: 1
+    m_FadeDuration: 0.1
+  m_SpriteState:
+    m_HighlightedSprite: {fileID: 0}
+    m_PressedSprite: {fileID: 0}
+    m_SelectedSprite: {fileID: 0}
+    m_DisabledSprite: {fileID: 0}
+  m_AnimationTriggers:
+    m_NormalTrigger: Normal
+    m_HighlightedTrigger: Highlighted
+    m_PressedTrigger: Pressed
+    m_SelectedTrigger: Selected
+    m_DisabledTrigger: Disabled
+  m_Interactable: 1
+  m_TargetGraphic: {fileID: 1484174637}
+  m_OnClick:
+    m_PersistentCalls:
+      m_Calls:
+      - m_Target: {fileID: 1484174635}
+        m_TargetAssemblyTypeName: DeleteHealthProp, Assembly-CSharp
+        m_MethodName: OnButtonClick
+        m_Mode: 1
+        m_Arguments:
+          m_ObjectArgument: {fileID: 0}
+          m_ObjectArgumentAssemblyTypeName: UnityEngine.Object, UnityEngine
+          m_IntArgument: 0
+          m_FloatArgument: 0
+          m_StringArgument: 
+          m_BoolArgument: 0
+        m_CallState: 2
+--- !u!114 &1484174637
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1484174633}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: fe87c0e1cc204ed48ad3b37840f39efc, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_Material: {fileID: 0}
+  m_Color: {r: 1, g: 1, b: 1, a: 1}
+  m_RaycastTarget: 1
+  m_RaycastPadding: {x: 0, y: 0, z: 0, w: 0}
+  m_Maskable: 1
+  m_OnCullStateChanged:
+    m_PersistentCalls:
+      m_Calls: []
+  m_Sprite: {fileID: 10905, guid: 0000000000000000f000000000000000, type: 0}
+  m_Type: 1
+  m_PreserveAspect: 0
+  m_FillCenter: 1
+  m_FillMethod: 4
+  m_FillAmount: 1
+  m_FillClockwise: 1
+  m_FillOrigin: 0
+  m_UseSpriteMesh: 0
+  m_PixelsPerUnitMultiplier: 1
+--- !u!222 &1484174638
+CanvasRenderer:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1484174633}
+  m_CullTransparentMesh: 1
 --- !u!1 &1547439119
 GameObject:
   m_ObjectHideFlags: 0
@@ -3623,6 +3771,85 @@ CanvasRenderer:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1717956219}
   m_CullTransparentMesh: 1
+--- !u!1 &1720564332
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 1720564333}
+  - component: {fileID: 1720564335}
+  - component: {fileID: 1720564334}
+  m_Layer: 5
+  m_Name: Text
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!224 &1720564333
+RectTransform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1720564332}
+  m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
+  m_LocalPosition: {x: 0, y: 0, z: 0}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children: []
+  m_Father: {fileID: 1484174634}
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
+  m_AnchorMin: {x: 0, y: 0}
+  m_AnchorMax: {x: 1, y: 1}
+  m_AnchoredPosition: {x: 0, y: 0}
+  m_SizeDelta: {x: 0, y: 0}
+  m_Pivot: {x: 0.5, y: 0.5}
+--- !u!114 &1720564334
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1720564332}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 5f7201a12d95ffc409449d95f23cf332, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_Material: {fileID: 0}
+  m_Color: {r: 0.19607843, g: 0.19607843, b: 0.19607843, a: 1}
+  m_RaycastTarget: 1
+  m_RaycastPadding: {x: 0, y: 0, z: 0, w: 0}
+  m_Maskable: 1
+  m_OnCullStateChanged:
+    m_PersistentCalls:
+      m_Calls: []
+  m_FontData:
+    m_Font: {fileID: 10102, guid: 0000000000000000e000000000000000, type: 0}
+    m_FontSize: 14
+    m_FontStyle: 0
+    m_BestFit: 0
+    m_MinSize: 10
+    m_MaxSize: 40
+    m_Alignment: 4
+    m_AlignByGeometry: 0
+    m_RichText: 1
+    m_HorizontalOverflow: 0
+    m_VerticalOverflow: 0
+    m_LineSpacing: 1
+  m_Text: Delete Health
+--- !u!222 &1720564335
+CanvasRenderer:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1720564332}
+  m_CullTransparentMesh: 1
 --- !u!1 &1757104830
 GameObject:
   m_ObjectHideFlags: 0
diff --git a/Assets/Samples/Playground/Scripts/Players/DeleteHealthProp.cs b/Assets/Samples/Playground/Scripts/Players/DeleteHealthProp.cs
new file mode 100644
index 0000000..9850f73
--- /dev/null
+++ b/Assets/Samples/Playground/Scripts/Players/DeleteHealthProp.cs
@@ -0,0 +1,19 @@
+using UnityEngine;
+using TaloGameServices;
+using System.Threading.Tasks;
+
+public class DeleteHealthProp : MonoBehaviour
+{
+    public string key = "currentHealth";
+
+    public async void OnButtonClick()
+    {
+        await DeleteProp();
+    }
+
+    private async Task DeleteProp()
+    {
+        await Talo.CurrentPlayer.DeleteProp(key);
+        ResponseMessage.SetText($"{key} deleted");
+    }
+}
diff --git a/Assets/Samples/Playground/Scripts/Players/DeleteHealthProp.cs.meta b/Assets/Samples/Playground/Scripts/Players/DeleteHealthProp.cs.meta
new file mode 100644
index 0000000..5a2f9ff
--- /dev/null
+++ b/Assets/Samples/Playground/Scripts/Players/DeleteHealthProp.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 9b13150b0c4504a3fa9f48302235223a
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/Samples/Playground/Scripts/Players/SetHealthProp.cs b/Assets/Samples/Playground/Scripts/Players/SetHealthProp.cs
index 0d16aa4..4ccc97c 100644
--- a/Assets/Samples/Playground/Scripts/Players/SetHealthProp.cs
+++ b/Assets/Samples/Playground/Scripts/Players/SetHealthProp.cs
@@ -1,5 +1,3 @@
-using System.Collections;
-using System.Collections.Generic;
 using UnityEngine;
 using TaloGameServices;
 using System.Threading.Tasks;
diff --git a/Packages/com.trytalo.talo/Runtime/APIs/EventsAPI.cs b/Packages/com.trytalo.talo/Runtime/APIs/EventsAPI.cs
index 22e8763..3541508 100644
--- a/Packages/com.trytalo.talo/Runtime/APIs/EventsAPI.cs
+++ b/Packages/com.trytalo.talo/Runtime/APIs/EventsAPI.cs
@@ -58,13 +58,10 @@ public async Task Track(string name, params (string, string)[] props)
                 name = name
             };
 
-            if (props != null)
-            {
-                ev.props = props
-                    .Select((propTuple) => new Prop(propTuple))
-                    .Concat(BuildMetaProps())
-                    .ToArray();
-            }
+            ev.props = props
+                .Select((propTuple) => new Prop(propTuple))
+                .Concat(BuildMetaProps())
+                .ToArray();
 
             ev.timestamp = DateTimeOffset.Now.ToUnixTimeMilliseconds();
             queue.Add(ev);
diff --git a/Packages/com.trytalo.talo/Runtime/APIs/LeaderboardsAPI.cs b/Packages/com.trytalo.talo/Runtime/APIs/LeaderboardsAPI.cs
index e559817..071a66e 100644
--- a/Packages/com.trytalo.talo/Runtime/APIs/LeaderboardsAPI.cs
+++ b/Packages/com.trytalo.talo/Runtime/APIs/LeaderboardsAPI.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Threading.Tasks;
 using UnityEngine;
+using System.Linq;
 
 namespace TaloGameServices
 {
@@ -44,13 +45,15 @@ public async Task<LeaderboardEntriesResponse> GetEntriesForCurrentPlayer(string
             return await GetEntries(internalName, page, Talo.CurrentAlias.id);
         }
 
-        public async Task<(LeaderboardEntry, bool)> AddEntry(string internalName, float score)
+        public async Task<(LeaderboardEntry, bool)> AddEntry(string internalName, float score, params (string, string)[] propTuples)
         {
             Talo.IdentityCheck();
 
+            var props = propTuples.Select((propTuple) => new Prop(propTuple)).ToArray();
+
             var uri = new Uri($"{baseUrl}/{internalName}/entries");
-            var content = JsonUtility.ToJson(new LeaderboardsPostRequest { score = score });
-            var json = await Call(uri, "POST", content);
+            var content = JsonUtility.ToJson(new LeaderboardsPostRequest { score = score, props = props });
+            var json = await Call(uri, "POST", Prop.SanitiseJson(content));
 
             var res = JsonUtility.FromJson<LeaderboardEntryResponse>(json);
             _entriesManager.UpsertEntry(internalName, res.entry);
diff --git a/Packages/com.trytalo.talo/Runtime/APIs/PlayersAPI.cs b/Packages/com.trytalo.talo/Runtime/APIs/PlayersAPI.cs
index af126bd..51033ae 100644
--- a/Packages/com.trytalo.talo/Runtime/APIs/PlayersAPI.cs
+++ b/Packages/com.trytalo.talo/Runtime/APIs/PlayersAPI.cs
@@ -42,7 +42,7 @@ public async Task Update()
         {
             var uri = new Uri($"{baseUrl}/{Talo.CurrentPlayer.id}");
             var content = JsonUtility.ToJson(Talo.CurrentPlayer);
-            var json = await Call(uri, "PATCH", content);
+            var json = await Call(uri, "PATCH", Prop.SanitiseJson(content));
 
             var res = JsonUtility.FromJson<PlayersUpdateResponse>(json);
             Talo.CurrentPlayer = res.player;
diff --git a/Packages/com.trytalo.talo/Runtime/Entities/EntityWithProps.cs b/Packages/com.trytalo.talo/Runtime/Entities/EntityWithProps.cs
new file mode 100644
index 0000000..8595aef
--- /dev/null
+++ b/Packages/com.trytalo.talo/Runtime/Entities/EntityWithProps.cs
@@ -0,0 +1,42 @@
+using System;
+using System.Linq;
+
+namespace TaloGameServices
+{
+    public class EntityWithProps
+    {
+        public Prop[] props;
+
+        public string GetProp(string key, string fallback = null)
+        {
+            Prop prop = props.FirstOrDefault((prop) => prop.key == key && prop.value != null);
+            return prop?.value ?? fallback;
+        }
+
+        public void SetProp(string key, string value)
+        {
+            if (GetProp(key) != null)
+            {
+                props = props.Select((prop) =>
+                {
+                    if (prop.key == key) prop.value = value;
+                    return prop;
+                }).ToArray();
+            }
+            else
+            {
+                var propList = props.ToList();
+                propList.Add(new Prop((key, value)));
+                props = propList.ToArray();
+            }
+        }
+
+        public void DeleteProp(string key)
+        {
+            Prop prop = props.FirstOrDefault((prop) => prop.key == key);
+            if (prop == null) throw new Exception($"Prop with key {key} does not exist");
+
+            prop.value = null;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Packages/com.trytalo.talo/Runtime/Entities/EntityWithProps.cs.meta b/Packages/com.trytalo.talo/Runtime/Entities/EntityWithProps.cs.meta
new file mode 100644
index 0000000..b843995
--- /dev/null
+++ b/Packages/com.trytalo.talo/Runtime/Entities/EntityWithProps.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 633021219c4b24d6e8a00f712dc2b778
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Packages/com.trytalo.talo/Runtime/Entities/LeaderboardEntry.cs b/Packages/com.trytalo.talo/Runtime/Entities/LeaderboardEntry.cs
index 8d1a232..24e12f6 100644
--- a/Packages/com.trytalo.talo/Runtime/Entities/LeaderboardEntry.cs
+++ b/Packages/com.trytalo.talo/Runtime/Entities/LeaderboardEntry.cs
@@ -3,7 +3,7 @@
 namespace TaloGameServices
 {
     [Serializable]
-    public class LeaderboardEntry
+    public class LeaderboardEntry: EntityWithProps
     {
         public int id;
         public int position;
diff --git a/Packages/com.trytalo.talo/Runtime/Entities/Player.cs b/Packages/com.trytalo.talo/Runtime/Entities/Player.cs
index cef4f4f..21d16ca 100644
--- a/Packages/com.trytalo.talo/Runtime/Entities/Player.cs
+++ b/Packages/com.trytalo.talo/Runtime/Entities/Player.cs
@@ -6,10 +6,9 @@
 namespace TaloGameServices
 {
     [Serializable]
-    public class Player
+    public class Player: EntityWithProps
     {
         public string id;
-        public Prop[] props;
         public Group[] groups;
 
         public override string ToString()
@@ -17,40 +16,24 @@ public override string ToString()
             return JsonUtility.ToJson(this);
         }
 
-        public string GetProp(string key, string fallback = null)
+        public async Task SetProp(string key, string value, bool update = true)
         {
-            Prop prop = props.FirstOrDefault((prop) => prop.key == key);
-            return prop?.value ?? fallback;
-        }
+            base.SetProp(key, value);
 
-        public async Task SetProp(string key, string value)
-        {
-            if (GetProp(key) != null)
-            {
-                props = props.Select((prop) =>
-                {
-                    if (prop.key == key) prop.value = value;
-                    return prop;
-                }).ToArray();
-            }
-            else
+            if (update)
             {
-                var propList = props.ToList();
-                propList.Add(new Prop((key, value)));
-                props = propList.ToArray();
+                await Talo.Players.Update();
             }
-
-            await Talo.Players.Update();
         }
 
-        public async Task DeleteProp(string key)
+        public async Task DeleteProp(string key, bool update = true)
         {
-            Prop prop = props.FirstOrDefault((prop) => prop.key == key);
-            if (prop == null) throw new Exception($"Prop with key {key} does not exist");
-
-            prop.value = null;
+            base.DeleteProp(key);
 
-            await Talo.Players.Update();
+            if (update)
+            {
+                await Talo.Players.Update();
+            }
         }
 
         public bool IsInGroupID(string groupId)
diff --git a/Packages/com.trytalo.talo/Runtime/Entities/Prop.cs b/Packages/com.trytalo.talo/Runtime/Entities/Prop.cs
index b334358..84afef9 100644
--- a/Packages/com.trytalo.talo/Runtime/Entities/Prop.cs
+++ b/Packages/com.trytalo.talo/Runtime/Entities/Prop.cs
@@ -1,4 +1,6 @@
-namespace TaloGameServices
+using System.Text.RegularExpressions;
+
+namespace TaloGameServices
 {
     [System.Serializable]
     public class Prop
@@ -15,5 +17,12 @@ public override string ToString()
         {
             return $"Key: {key}, Value: {value}";
         }
+
+        public static string SanitiseJson(string json)
+        {
+            string match = "\"key\":\"(\\w+)\",\"value\":\"\"";
+            string replacement = "\"key\":\"$1\",\"value\":null";
+            return Regex.Replace(json, match, replacement);
+        }
     }
 }
diff --git a/Packages/com.trytalo.talo/Runtime/Requests/LeaderboardsPostRequest.cs b/Packages/com.trytalo.talo/Runtime/Requests/LeaderboardsPostRequest.cs
index 3942552..c27cab4 100644
--- a/Packages/com.trytalo.talo/Runtime/Requests/LeaderboardsPostRequest.cs
+++ b/Packages/com.trytalo.talo/Runtime/Requests/LeaderboardsPostRequest.cs
@@ -4,5 +4,6 @@
     public class LeaderboardsPostRequest
     {
         public float score;
+        public Prop[] props;
     }
 }
diff --git a/Packages/com.trytalo.talo/Runtime/Utils/RequestException.cs b/Packages/com.trytalo.talo/Runtime/Utils/RequestException.cs
index c97b286..522c87b 100644
--- a/Packages/com.trytalo.talo/Runtime/Utils/RequestException.cs
+++ b/Packages/com.trytalo.talo/Runtime/Utils/RequestException.cs
@@ -4,6 +4,8 @@ namespace TaloGameServices
 {
     public class RequestException : Exception
     {
+        public long responseCode;
+
         public RequestException()
         {
         }
@@ -11,11 +13,13 @@ public RequestException()
         public RequestException(long responseCode)
             : base(responseCode.ToString())
         {
+            this.responseCode = responseCode;
         }
 
         public RequestException(long responseCode, Exception inner)
             : base($"{responseCode}: {inner.Message}", inner)
         {
+            this.responseCode = responseCode;
         }
     }
 }