{
  "manageEntity": {
    "action": "Save",
    "entityId": "134236494",
    "entityType": "Track",
    "nonce": "0xe7fca58b4165081238df51f7b3f5093ec6290ff5f3bc36be8513e94fd0bb0698",
    "signature": "0x97ae05686e747fdfa2e836affd04ee584b845df9c412e0ea2590574268036615158380685c647a1538a613a5943bfcd21356eac4e5168a303a5257e84aa07f3d1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}