{
  "manageEntity": {
    "action": "Save",
    "entityId": "177126183",
    "entityType": "Track",
    "nonce": "0x64e2cf2d7acc88a75dc668a4d1a4200181e07660d4ddcf640d1a4ecfaa7629a5",
    "signature": "0x8413fb09b8aa13d33d4f76b949de1381a3cdc9b0c21b2d95231b1d1bad43d63a4c57d6d0e6e061c77af10b0c7ae9b34ec8986502421a87752ef05878d5ce80581c",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}