{
  "manageEntity": {
    "action": "Save",
    "entityId": "598476643",
    "entityType": "Track",
    "nonce": "0x47f2f14a793322d9cf17585ec719b01f001ec2645770750b54bb2a91e4d21069",
    "signature": "0xcf8cc311af458027ed17ff339ee61eeefe9d5875a95b8f75bae2b78767275ad10a2c15b09e958e6b75785c23e423d3f0474eb3a38599dd03855cd9fe3d5d16841b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}