{
  "objectType": "activity",
  "verb": "rsvp-yes",
  "url": "http://example.com/this/rsvp",
  "object": [{
    "id": "http://example.com/event",
    "url": "http://example.com/event",
    "objectType": "event"
  }, {
    "id": "http://other.event",
    "url": "http://other.event",
    "objectType": "event"
  }]
}
