{
  "manageEntity": {
    "action": "Save",
    "entityId": "1716186852",
    "entityType": "Track",
    "nonce": "0x3f31fc07b2a1ef61d2d5ff79bb6d72e964dfe9fde2970cc7b3c4e1dcf64557c1",
    "signature": "0x1fc4f9493af9595d66cc8afe5f9fd81506163b4b44b36acf9b8a1035e0c174c36cdf833fe453da06e0190f6fa1325ca58bc26ad17ab7d87bdeba83223e2a9aaa1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}