{
  "manageEntity": {
    "action": "Save",
    "entityId": "56816",
    "entityType": "Track",
    "nonce": "0x4fb8fc14cee409e43367b3bb80a996f9c058bf11d88a8a77a3c88f5cf83b561d",
    "signature": "0x4ffae8c015adb02345d2dddb7eacb9cab21dfc864952e2504a56cbfd79d6d42433b53119260d992b56a3032f7b92fb8cb4be70dc27370becd524428541d8e82e1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}