{
  "manageEntity": {
    "action": "Save",
    "entityId": "1015982297",
    "entityType": "Track",
    "nonce": "0x36b286cb7e38a596d5b1c8dc7a10dd93604c50f4aca2e6e319b07ae236076196",
    "signature": "0x2d93e4f461c2a557785920ee24623b44560ea24eda75127afb6b16d952ce2e1030039337c1a6221bf42aa3806dbffc4c46f7fb66eb8a81b35224031798c6afd51c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}