{
  "manageEntity": {
    "action": "Save",
    "entityId": "1959914892",
    "entityType": "Track",
    "nonce": "0xed9e44b0de9d714fe0c58df4dcd2be9ccbec685c2bb3a23a642efdb05d4144e3",
    "signature": "0x0ec2a616b14ac75265b3d8244dab73ec3f9d5702d4ab68a517cbcaf2aa75394f750430db7954c693a6e02e159ae26427c23254e85d97897a75f3db47f7c80e201c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}