{
  "manageEntity": {
    "action": "Save",
    "entityId": "533998714",
    "entityType": "Track",
    "nonce": "0xa525a8d0f9bae49d5fcb6ddd3c7a750b7a7fb3e26c8bdf7062c4545cddfe902a",
    "signature": "0xbbd9b8405860156de66b57e32421e2681695117574a14136a68f9ed9d5dcf5ca605b3e94a15b60ed46709302aa3adcaab063d75708fecb4aa56d9870303f80531b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}