Question Is it possible to use the productsReceived parameter in custom events?

Is it possible to use the productsReceived or productsSpent or any of the other objet type standard parameters in a custom event? I'm able to add them to the schema in the dashboard, but I don't see any way to send them through the Unity SDK. I've been trying to send through the REST API, but those events get flagged as invalid with the reason being "Event schema itemActioned not found."

 

We're not currently using any IAP system, though we're planning on adding Unity IAP in the future. We're trying to track an event where a player is awarded several items and or virtual currencies, so the Transaction didn't seem like the appropriate event to use.
We're basing our schema off of the schema we used in DDNA in a previous project where we had a custom rewards object parameter with a similar structure to productsReceived. Since custom object parameters aren't an option in Unity Analytics, I was looking into whether we could use productsReceived instead.

 

I tried using this initially:

Code (CSharp):

1. var parameters = new Dictionary<string, object>()
2. {
3.   { "itemName", "TestItem" },
4.   { "itemType", "TestItemType" },
5.   { "itemID", "1234" },
6.   { "action", "Claimed" },
7.   { "productsReceived", new Unity.Services.Analytics.Product() },
8. };
9. AnalyticsService.Instance.CustomData("itemActioned", parameters);

Which resulted in the error:
Unknown type found for key productsReceived, this value will not be included.

This is what I was using to send through the REST API:

Code (CSharp):

1. StringBuilder postData = new StringBuilder();
2. postData.Append("{\"eventName\":\"itemActioned\",");
3. postData.Append(  "\"userID\":\"").Append(AnalyticsService.Instance.GetAnalyticsUserID()).Append("\",");
4. postData.Append(  "\"eventUUID\":\"").Append(Guid.NewGuid().ToString()).Append("\",");
5. postData.Append(  "\"eventVersion\":1,");
6. postData.Append(  "\"eventParams\":{");
7. postData.Append(    "\"platform\":\"MAC_CLIENT\",");
8. postData.Append(    "\"itemName\":\"TestItem\",");
9. postData.Append(    "\"itemType\":\"TestItemType\",");
10. postData.Append(    "\"itemID\":\"1234\",");
11. postData.Append(    "\"action\":\"Claimed\",");
12. postData.Append(    "\"productsReceived\":{}");
13. postData.Append(  "}");
14. postData.Append("}");
15.  
16. Debug.Log($"UGS post data: {postData}");
17.  
18. string url = $"https://collect.analytics.unity3d.com/api/analytics/collect/v1/projects/{UnityEngine.Application.cloudProjectId}/environments/dev";
19. var request = new UnityWebRequest(url, "POST");
20. request.uploadHandler = new UploadHandlerRaw(Encoding.UTF8.GetBytes(postData.ToString()))
21. {
22.   contentType = "application/json"
23. };
24.  
25. var requestOp = request.SendWebRequest();
26. requestOp.completed += delegate
27. {
28.   Debug.Log($"UGS responseCode: {request.responseCode}");
29. };

I got back a 204 response code, but in Event Browser it was flagged as invalid with "Event schema itemActioned not found." as the reason. I'm thinking that may be unrelated to the specific parameters I'm using though, since it seems like the same issue from https://forum.unity.com/threads/why-are-rest-api-custom-analysis-events-invalid-events.1320606/