{
  "$type": "app.bsky.feed.post",
  "text": "hi @alice!",
  "fooOriginalText": "hi @alice!",
  "createdAt": "2022-01-02T03:04:05.000Z",
  "facets": [{
    "$type": "app.bsky.richtext.facet",
    "features": [{
      "$type": "app.bsky.richtext.facet#mention",
      "did": "did:plc:789"
    }],
    "index": {
      "byteStart": 3,
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    }
  }]
}
