{
  "@context": "https://www.w3.org/ns/activitystreams",
  "summary": "Sally liked a note",
  "type": "Like",
  "actor": "http://sally.example.org",
  "object": [
    "http://example.org/posts/1",
    {
      "type": "Note",
      "summary": "A simple note",
      "content": "That is a tree."
    }
  ]
}