Acumatica API insert data "Bad Request" - acumatica

Question

I'm trying to insert a stock item into Acumatica using the API, but I'm getting a 400 error - Bad Request. I'm using HttpClient to login, retrieve a stock item, and send the insert request. All is working except the insert request. I have tried the following url (including expand parameter):
http://localhost/AcumaticaERP/entity/Default/6.00.001/StockItem?$expand=Attributes,CrossReferences,UOMConversions,VendorDetails,WarehouseDetails
... and also the following url (without expand parameter)
http://localhost/AcumaticaERP/entity/Default/6.00.001/StockItem
I'm calling via HttpClient PutAsync, passing in the URLs mentioned above, and the data is JSON from a stock item retrieved with the API, and which doesn't exist in the current db.
client.PutAsync(insertUrl, new StringContent(data, Encoding.UTF8, "application/json")).Result;
Any ideas what I'm missing?
NEW DETAILS:
After further debugging and testing with Postman, the error from the PUT seems to be "Error reading JObject from JsonReader. Current JsonReader item is not an object: StartArray. Path '', line 1, position 1." The JSON was taken directly from a GET though, so I'm not sure what the problem could be. Below is the JSON returning an error from the PUT.
[
{
"id": "cc27ce56-6302-4f1b-97aa-49cca3ed32ea",
"rowNumber": 1,
"note": "",
"Attributes": [],
"BaseUOM": {
"value": "EA"
},
"CrossReferences": [],
"DefaultIssueLocationID": {
"value": "R1S1"
},
"DefaultReceiptLocationID": {
"value": "RECEIVING"
},
"DefaultWarehouseID": {
"value": "WHOLESALE"
},
"Description": {
"value": "tonyitem2"
},
"ImageUrl": {},
"InventoryID": {
"value": "TONYITEM2"
},
"IsAKit": {
"value": false
},
"ItemClass": {
"value": "CONSUMER 300TOYS"
},
"ItemStatus": {
"value": "Active"
},
"ItemType": {
"value": "Finished Good"
},
"LastModified": {
"value": "2018-08-03T12:09:19.907-04:00"
},
"LotSerialClass": {
"value": "NOTTRACKED"
},
"PurchaseUOM": {
"value": "EA"
},
"SalesUOM": {
"value": "EA"
},
"UOMConversions": [],
"VendorDetails": [],
"Volume": {
"value": 0
},
"WarehouseDetails": [
{
"id": "3ca5ea4c-c651-498e-8e6c-49119481982c",
"rowNumber": 1,
"note": "",
"DefaultIssueLocationID": {
"value": "R1S1"
},
"DefaultReceiptLocationID": {
"value": "RECEIVING"
},
"IsDefault": {
"value": true
},
"QtyOnHand": {
"value": 0
},
"WarehouseID": {
"value": "WHOLESALE"
},
"custom": {},
"files": []
}
],
"Weight": {
"value": 0
},
"custom": {},
"files": []
}
]
I also tried removing the brackets surrounding the JSON, and then the error is:
"No entity satisfies the condition.". Could the issue be that the ids have GUIDs, but I'm trying to do an insert? How do you indicate that the PUT is supposed to be inserting?

Answer 1

I finally got the PUT to insert. What finally worked was removing the wrapping braces "[" and "]" around the entire JSON; plus removing all "id", "rowNumber", "custom", and "files" fields, and all empty collections (e.g. Attributes, CrossReferences) in my JSON. I'm not sure which of these being removed resolved it and allowed me to insert, but it finally worked.
It's real unfortunate that the JSON you retrieve via GET can't be inserted via PUT without stripping all of this out first though. What a pain.