{
  "manageEntity": {
    "action": "Save",
    "entityId": "1347669057",
    "entityType": "Track",
    "nonce": "0x8bfed64411d1622b85c92eb8b6262bd1a701e7c592365d9376d59c610ea54229",
    "signature": "0x0b59eecefad1762ed9e664845b6b983e7f98116e193646ea411cda83289fc5915a1adb3d84ea4b4c841df7576f6c4224b37b7c89907b1f8420065f5880c642911b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}