{
  "input": {
    "type": "identify",
    "userId": "user-id",
    "traits": {
      "created": "2014-01-01",
      "email": "jd@example.com",
      "date": "2014-01-01",
      "trait": true
    }
  },
  "output": {
    "email": "jd@example.com",
    "created_at": 1388534400,
    "id": "user-id",
    "trait": true,
    "date": 1388534400
  }
}