{
  "manageEntity": {
    "action": "Create",
    "entityId": "1603853879",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"asdf\",\"entity_id\":1753882268,\"track_timestamp_s\":11}}",
    "nonce": "0x678b688e65f55e2f72cbbf34e87e1c914331c1748edbbb7544fd322a715361e7",
    "signature": "0xfe46367282dbee453b6ab9fe5d79c723424e629846ccafd6f280fa1fd6b8ba233a394c7ac3310f1263366b2410e5ca3f9506430b2bbf1fd9a1f9f31b9069f9911b",
    "signer": "0x6687B667182cfdc5646f5AEB14a9945c9b1d3A6B",
    "userId": "100"
  }
}