{
  "manageEntity": {
    "action": "Save",
    "entityId": "427666",
    "entityType": "Track",
    "nonce": "0xe6465b22ac260935c2d6b32afee4275147efba5384b2f3453786772edbcc6d9d",
    "signature": "0xfa59c96b80ac91c7404732ec4d95c0df8f1be9ae037df0916761059315c2e0e703595a8c5a3b12b5538f02d90479bbac7902e3b90801a13b7fecff2e9a50b88e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}