{
  "manageEntity": {
    "action": "Save",
    "entityId": "1592843128",
    "entityType": "Track",
    "nonce": "0xa51728655f0588a17bab368924f39882a4fd314a305dadaf9ba0d05fad9645fb",
    "signature": "0xfe1038018a394786b1fcdc89da873e6bea1884643c28f09d33dc2987342a05f61cbc55fa244298f1a600a2025da2433f9099bb16860e30152b264b7e523047771c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}