{
  "input": {
    "type": "identify",
    "userId": "user-id",
    "timestamp": "2014",
    "traits": {
      "firstName": "john",
      "lastName": "doe",
      "email": "jd@example.com",
      "some object": {},
      "list": ["one", "two"],
      "time": "2014-01-01"
    }
  },
  "output": {
    "uid": "user-id",
    "occurred_at": 1388534400,
    "action_name": "came_back",
    "properties": {
      "email": "jd@example.com",
      "time": 1388534400,
      "first_name": "john",
      "id": "user-id",
      "last_name": "doe",
      "list": "one,two",
      "some object": "{}"
    }
  }
}