{
  "manageEntity": {
    "action": "Save",
    "entityId": "1866233740",
    "entityType": "Track",
    "nonce": "0x292418f94469873da99b5e37de122af40ded43e086b7c1f10a295a32f2f098af",
    "signature": "0xad1321127816ec019aa848b7a6e9a7d7010e103d4c46e157a1fd252403cdbfcb3c38a5e2501a4ebe45cd3f148936d0e86b7eaace1d45b24f3a6cc5e9fbe5bab21b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}