{
  "manageEntity": {
    "action": "Save",
    "entityId": "1148847381",
    "entityType": "Track",
    "nonce": "0x3df913dad5d8a3256a7ca7247615c8d541b0c45c7f07b1aa602065f59e44d1bb",
    "signature": "0xc4ae0431fec00ca3ebbacc8bc4aec4426a1f58c02032e564d5294df8b7f8e9752fef2bb65e88d8781c5c53fc067f31eeaacc51ea17696b0ed958d710d867dc561b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}