curl --request GET \
  --url https://api.cal.com/v2/webhooks/{webhookId} \
  --header 'Authorization: <authorization>'

{
  "status": "success",
  "data": {
    "payloadTemplate": "{\"content\":\"A new event has been scheduled\",\"type\":\"{{type}}\",\"name\":\"{{title}}\",\"organizer\":\"{{organizer.name}}\",\"booker\":\"{{attendees.0.name}}\"}",
    "triggers": [],
    "userId": 123,
    "id": 123,
    "subscriberUrl": "<string>",
    "active": true,
    "secret": "<string>"
  }
}