SYNQ userdata Update API sample calls

userdata_update.js

//this call will modify year from above to be 2017
video.userdata.cars[0]["year"]=2017

//this call will add the model 'slk' to the above sample
video.userdata.cars[0]["models"].push("slk")

//sample body response from Update API after above calls
{
 "state": "created",
 "userdata": {
   "cars": [
     {
       "make": "mercedes",
       "year": 2017,
       "models": [
         "c",
         "cls"
         "slk"
        ]
     }
   ]
 },
 "video_id": "9af7df3099104e9c952dff1234567891",
 "created_at": "2017-05-09T17:45:21.445Z",
 "updated_at": "2017-05-09T18:41:38.934Z"
}