curl --request GET \
  --url https://api.hubapi.com/webhooks/v3/{appId}/subscriptions/{subscriptionId}

{
  "createdAt": "2023-11-07T05:31:56Z",
  "objectTypeId": "<string>",
  "propertyName": "<string>",
  "active": true,
  "eventType": "contact.propertyChange",
  "id": "<string>",
  "updatedAt": "2023-11-07T05:31:56Z"
}