{
  "manageEntity": {
    "action": "Save",
    "entityId": "1990494978",
    "entityType": "Track",
    "nonce": "0xb127e3a6154fbf661dfd60a0db956de34cc4ca9694706adb8d6d929db9417a68",
    "signature": "0xbf64ee5cd8a4522753bc7764edfc8781858a18adb3d0e5f8fbe5f853b736d14e17ab1ce272f97b72f937b9b35d37e0b7ccd892e7638dabc3a679b93658bd3a791c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}