{
  "@context": "https://www.w3.org/ns/activitystreams",
  "type": "Image",
  "summary": "Picture of Sally",
  "url": "http://example.org/sally.jpg",
  "tag": [
    {
      "type": "Person",
      "id": "http://sally.example.org",
      "name": "Sally"
    }
  ]
}