{
  "manageEntity": {
    "action": "Save",
    "entityId": "268496",
    "entityType": "Track",
    "nonce": "0x550cb90a1206306bb4190f57a5a9a32661309452476d06e1912721daddbb4907",
    "signature": "0xf4624501f9779b8e561b651e7530575a10d308c582bf8a177a2c0dd797b2936450edd28314e17a4f4d6625d535728e99c7f8394d35980b689741865b2e9cf3bc1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}