{
  "manageEntity": {
    "action": "Save",
    "entityId": "1542816262",
    "entityType": "Track",
    "nonce": "0xf6d18464c7c5fb81c3e73e294e837c3984e988a4d4044cf789bcb7b6a5b01456",
    "signature": "0x99da12f9d7e9319e94dd0dbc3d6c5cb07a81b9aab742e11f48fea4872f7ec806305487bc23a1d944f0b07352a4931e4f57b8f49ab1b412ac1fbf8f005bcd98a21b",
    "signer": "0xd9bA17330fFb3Ea1356C5eC14971D9e1f2cb5200",
    "userId": "337125448"
  }
}