{
  "@context": "http://www.w3.org/ns/activitystreams#",
  "type": "Undo",
  "actor": {
    "type": "Person",
    "id": "http://example.org/sally",
    "name": "Sally"
  },
  "object": {
    "type": "Like",
    "actor": {
      "type": "Person",
      "id": "http://example.org/sally",
      "name": "Sally"
    },
    "object": {
      "id": "http://example.org/notes/1",
      "type": "Note",
      "content": "This is a note",
      "url": [{
        "type": "Link",
        "href": "http://example.org/notes/1",
        "mediaType": "text/html"
      }]
    }
  }
}
