{
  "manageEntity": {
    "action": "Save",
    "entityId": "240281133",
    "entityType": "Track",
    "nonce": "0xf0cb46e62652ef9cc5c37ad6895de4212f402187929c385aced03385a50b3907",
    "signature": "0x5c839e82af29f1586eab8a4df820e48e24f8da52539c8cf46f1d8577271b57e6570a5a63cf47f23484f387d3c486c455da644590b19d58d9f3c39231bf2e0a891c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}