{
  "@context": "https://www.w3.org/ns/activitystreams",
  "summary": "A simple note",
  "type": "Note",
  "content": "This is all there is.",
  "icon": {
    "type": "Image",
    "name": "Note icon",
    "url": "http://example.org/note.png",
    "width": 16,
    "height": 16
  }
}