{
  "manageEntity": {
    "action": "Save",
    "entityId": "1287307062",
    "entityType": "Track",
    "nonce": "0x63a6b0c6598d900da35e5bfd644ae42c6d60e17e0786bc7146f4725ce9250bf5",
    "signature": "0x33dce60a4643e094fc7184392bae41d648cbb6958a74380d5cdff8f54fb5dc663ce2426261bf2c2b29ccb1c4813cac40ca24e4d660ec235af72af515fac2272a1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}