{
  "manageEntity": {
    "action": "Save",
    "entityId": "1199968326",
    "entityType": "Track",
    "nonce": "0xfa9ec9c52c6926d6f1374014eb031fe8e9bdad05f040062ad0e2d90386a65f8e",
    "signature": "0xd70fe7846112d36f9d2fa67ddd12f8f77a52d510922360dd1b396fd7b7f35eed5129f23ed54739e932b1b122daaefcc7caa3cb541fd87bd994fa9fcfcbcd6c491c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}