{
   "id":"urn:ngsi-ld:Subscription:randomUUID",
   "type":"Subscription",
   "entities":[
      {
         "type":"Building"
      }
   ],
   "notification":{
      "format":"keyValues",
      "endpoint":{
         "uri":"http://my.endpoint.org/notify",
         "accept":"application/json"
      }
   },
   "@context":[
      "contextUnretrievable"
   ]
}