HTTP/1.1 404 Not Found
Content-Type: application/json; charset=utf-8
Date: Mon, 25 Aug 2014 23:57:54 GMT

{
  "type": "error.list",
  "errors": [
    {
      "code": "not_found",
      "message": "No such user with id[123456]"
    }
  ]
}