
{
 "@context": "https://www.w3.org/ns/activitystreams",
 "summary": "History of John's note",
 "type": "Collection",
 "items": [
   {
     "summary": "Sally liked John's note",
     "type": "Like",
     "id": "http://activities.example.com/1",
     "actor": "http://sally.example.org",
     "published": "2015-11-12T12:34:56Z",
     "object": {
       "summary": "John's note",
       "type": "Note",
       "id": "http://notes.example.com/1",
       "attributedTo": "http://john.example.org",
       "content": "My note"
     }
   },
   {
     "summary": "Sally no longer likes John's note",
     "type": "Undo",
     "id": "http://activities.example.com/2",
     "actor": "http://sally.example.org",
     "published": "2015-12-11T21:43:56Z",
     "object": "http://activities.example.com/1"
   }
 ]
}
