curl --request POST \
  --url https://realtime-api.voiceflow.com/v1/stable/test-turn/batch \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "testID": "<string>",
  "turns": [
    {
      "type": "user",
      "payload": {
        "response": "<string>",
        "variableStates": "<string>"
      }
    }
  ]
}
'

{
  "turns": [
    {
      "id": "<string>",
      "testID": "<string>",
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z",
      "type": "user",
      "payload": {
        "response": "<string>",
        "variableStates": "<string>"
      }
    }
  ]
}