{
  "manageEntity": {
    "action": "Create",
    "entityId": "547791419",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":1618380069,\"body\":\"straight up excellent\",\"track_timestamp_s\":73}}",
    "nonce": "0x2686aab5edbdec51e444be3dfa92be35b75e5b794fafe520cf4ee78e275be327",
    "signature": "0x3b2d321a0d16a98d13b163c2144cafb76474f390a4a7482ff50d02185217ab036385418dd085f38d3b26876ce15b49c9ee3e2297c961e58a45dfc0ea9c0182821c",
    "signer": "0x1CE93c43F8574f553E8071e946654066188B61BC",
    "userId": "20"
  }
}