{
  "objectType": "note",
  "attachments": [
    {"objectType": "audio", "stream": {"url": "bar.mp3"}},
    {"title": "bazzz", "url": "baz"}
  ],
  "author": {
    "displayName": "Martin Smith",
    "image": "http://example.com/martin/image",
    "url": "https://example.com/martin"
  }
}
