{
  "manageEntity": {
    "action": "Save",
    "entityId": "1762319042",
    "entityType": "Track",
    "nonce": "0x8cd5eb59529c24ca038ce862f921df082ab05ea3f867da09ea029756edfb78b8",
    "signature": "0xd28f01b5ca96621a9596140cc541b5adf3bc8a9171d4f789903f26105640b1310ead89262978dde46a8bc419ecb39aa0c25c32c27f896f2ebade0df20c4efe341c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}