{
  "manageEntity": {
    "action": "Save",
    "entityId": "1366068978",
    "entityType": "Track",
    "nonce": "0xbfb42cf59431ef5b1ef717f5087fb18d4de05f8cd562c8d724cd9fcf293f2cfe",
    "signature": "0x30546854b2387a7f9472553bf6f6c3fea9c915436133805e7a90263945f5ae054e4d7e38c629de27bc43a6d9482b9ae42627ce6c4572694a5f0073c8a7fce9661c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}