{
  "manageEntity": {
    "action": "Save",
    "entityId": "1226240706",
    "entityType": "Track",
    "nonce": "0x41ad036e3c86d59414690bc33a55c5eec902f47a25d8828a5296b6875fd17b50",
    "signature": "0xdcef2c289be9b53db6d1208ddeaffb212c40a99756c1bf19c248241f89466b096bf7acc7cae317d4e11d583bb08b9ffb7d58483279c955ca32422b9a75db1afc1b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}