{
  "manageEntity": {
    "action": "Save",
    "entityId": "176853389",
    "entityType": "Track",
    "nonce": "0xb1945b6fa8291f7beae82c560cae8f75acc283daff58ceacaed0d6f94f308d89",
    "signature": "0xa25ee8b20df5ccae0fc30b6005de08a3447b5a7538a6a978fae8e998f781e97a72a2a46ef0028155d021aae6b1ac297c93147e77ac4c4353bfa2b96c53d950d11c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}