{
  "input": {
    "userId": "user-id",
    "event": "my-event",
    "timestamp": "2014",
    "type": "track",
    "properties": {
      "revenue": 19.99,
      "description": "some description",
      "plan": "premium"
    }
  },
  "output": {
    "amount": 19.99,
    "reason": "some description",
    "plan": "premium",
    "dateTime": "2014-01-01T00:00:00.000Z",
    "custom": {
      "description": "some description",
      "plan": "premium",
      "revenue": 19.99
    }
  }
}