{
  "manageEntity": {
    "action": "Save",
    "entityId": "349579180",
    "entityType": "Track",
    "nonce": "0x11c5fe4d68504148362de8983f77b357571bce2814c915df3e00cf664e04aced",
    "signature": "0xe451d0bad3b4a82bb8a61149b196814c3608acde0a8eeb57a1dab820b9b9fb285581b98a4545a539ab4d256d42d6f01492d75ddd5eb90999a652b486d75ec2681b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}