{
  "objectType": "note",
  "content": "hi @alice!",
  "author": "did:plc:foo",
  "tags": [{
    "objectType": "mention",
    "url": "https://bsky.app/profile/did:plc:789",
    "displayName": "@alice",
    "startIndex": 3,
    "length": 6
  }],
  "published": "2022-01-02T03:04:05.000Z"
}
