{
  "manageEntity": {
    "action": "Create",
    "entityId": "128372884",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":387870391,\"entity_id\":312245,\"body\":\"Nice~\",\"comment_id\":128372884,\"mentions\":[]}}",
    "nonce": "0x6da9f734813b8053f2cf0f1e7b8c35cfa3436f3be99b9f62f67512314836fb50",
    "signature": "0x23a4adaa54279db88ee340c6483b52090608f26cd0685dd51d90ee2bb673aa8067230b96b730f1d01f318b178747c4f2bdd1c0544273fd8de7936180c880f4fb1c",
    "signer": "0xf2A3959FD8c093454867658F3230042b9388B84B",
    "userId": "387870391"
  }
}