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{
   "callback_id": "AB3423",
   "event_type": "person_added",
   "destination": {
      "url": "http://destination.url",
      "method": "POST",
      "content_type": "application/json"
   },
   "start_date": "2010-01-01T00:00Z",
   "end_date": "2020-01-01T00:00Z",
   "url": "/companies/:id/mobiledb/config/callbacks/:callback_id",
   "created_at": "2012-04-05T14:30Z",
   "updated_at": "2012-05-08T19:30Z"
}