{
  "manageEntity": {
    "action": "Save",
    "entityId": "1348140038",
    "entityType": "Track",
    "nonce": "0x138177a19cf7b560ca094e31c564dce4099fea3af56e06563e1188d2cec32a76",
    "signature": "0x21f947c8b92cf5f7535f5e21e8b7088e54154c2e3c82f624df818a02917785157c68348f114184ad0e2ada826e0ac18cb046ef27b19b6becb9309cb8f53e2bef1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}