{
  "manageEntity": {
    "action": "Save",
    "entityId": "2125614408",
    "entityType": "Track",
    "nonce": "0x99d8475472f866ae5d545ff54cd19bca6e07dcf5cc0fcd49ddc1bf45d44d0f00",
    "signature": "0x7045021a4fb94bbebcb14f1cf448758d8f6abc94356a27eab128408acc0853c83090d4ac256cff9d7a1f62bbd670a1d5dd42d7e12c156bc368f18bfd97889ef21b",
    "signer": "0x1A0e34aBD5374BDd677c5de4D5D9718089cB05Eb",
    "userId": "644286186"
  }
}