{
  "manageEntity": {
    "action": "Save",
    "entityId": "163519325",
    "entityType": "Track",
    "nonce": "0x2210ec0d110ec822ee79f1a82814d11753ac713d44729b176ec06d496d1b56a3",
    "signature": "0xd6ab4c9cfe88a4a4f51eccda7b3c98b140ad98d694c091347695f624e93e4e857c35db7012e35001f0c9ce4ee4733a1af6dec89468219621f24a8cfe8e0d1bfd1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}