{
  "manageEntity": {
    "action": "Save",
    "entityId": "1932964718",
    "entityType": "Track",
    "nonce": "0x5e46af00989a83f42cf5a7748dbb6832007d9819cb456ac4f904fa05fd0f2a1d",
    "signature": "0xfcd6ed4b3027cc14e80f7fd809aea8bf8f4d8ef7f088bea4c7f66fe5298cdc3d5fe2727f6a7b2445cfc6691edda7745e7b155dd86344f79d049fe4c673a1c9571b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}