{
  "manageEntity": {
    "action": "Save",
    "entityId": "360421804",
    "entityType": "Track",
    "nonce": "0xa7a44e6c995c3805645c483c603992c049c3f2000d65e7b5d97a702d12c50184",
    "signature": "0x635f8646d5cefc39cffb1c211acb0e11783e8f0925e70b202f8164ee7e057bca6f4ef6b1b39dc14b0cd0e7496b36dc22eb214cfbbf9da24d3f4918d10919a1c71c",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}