{
  "manageEntity": {
    "action": "Save",
    "entityId": "1230876481",
    "entityType": "Track",
    "nonce": "0xb86aee2a9da41e768441f0f5a8a2e70c7b9ebdc1924e9e06123d35465ae730ff",
    "signature": "0xe52fbad5cf3fa26f9472f373e24e9ab00c62bcdcb402f7f538204331ae287c884d7090958ebb7d26abef1f186f850f9827362fee0afb4f42cbb2a44fcc29b6cb1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}