{
  "manageEntity": {
    "action": "Save",
    "entityId": "403264847",
    "entityType": "Track",
    "nonce": "0x1ac1bf02c5a6732d024aeb946c8b0f1495971375d1f677a266d47122a627e4ab",
    "signature": "0xfaf10daccb86e400ea3dffd78a470538b5c4218f3666bac8e6f3342044ac07dd19bf71cc27c54d20f8f2c6cc62c3df5ad395e5e5d02904cfdb2bf1040372be651b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}