{
  "manageEntity": {
    "action": "Save",
    "entityId": "742605",
    "entityType": "Track",
    "nonce": "0x0955b6748eea15735ed70e7ad03584c288cda924425abc9171d8d7e4ed3cf494",
    "signature": "0x45ff45117941acaf0447c9c541ff2436b74945dac6957ca2e5c8d2e9764278a6063af8e18c4eaf7cad77a94e5332076546831930f2a7fceb8385c83c43e0b13b1b",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}