{
  "manageEntity": {
    "action": "Create",
    "entityId": "1391045199",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"body\":\"really sick!!!\",\"entity_id\":711864328,\"track_timestamp_s\":100}}",
    "nonce": "0xe7835de88c28f1554feaf6d03469315a7eeb8ddb1c4f81e235def75c35d6a42f",
    "signature": "0x748a36730680aca89543f11570f5d63ddaf6a2d2bae594282fd74e04382e1bea4b17ac30e92dbfca2e31a033c818e50101418c59bcb7ee069648c81614b061051c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}