{
  "manageEntity": {
    "action": "Save",
    "entityId": "1293528379",
    "entityType": "Track",
    "nonce": "0x4688f589d813bcca7b5db57a2ff8be166faf346b7a118302961c8ba3ca263ff8",
    "signature": "0xd18a2c898884b93b536cfb16030765069c1ae3d6f80b1ef602f71e62fa846be011174b8ca5656e55b2eb166244cccbaa876144465ceb20f54a3bcb3580e3c9221c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}