{
  "userTrackingSubscription": {
    "clientCorrelator": "0123",
    "resourceURL": "http://example.com/exampleAPI/location/v1/subscriptions/userTracking/subscription123",
    "callbackReference": {
      "notifyURL": "http://clientApp.example.com/location_notifications/123456"
    },
    "address": "acr:192.0.2.1",
    "userEventCriteria": "Transferring"
  }
}