{
  "manageEntity": {
    "action": "Save",
    "entityId": "979794665",
    "entityType": "Track",
    "nonce": "0xb710de274f62ba1678a87ee9c23c441d86bb7139f2a7754caacd9efd8348fe6e",
    "signature": "0x48f662144e3cd47ea27d56dbdd86dfbac4fd99f8ef52403c140647e84dce17df6a2180d138dcd581b7da4c2d30f4c1a97bd9a2b25237e2e6bc2daae7aef193541b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}