Get webhook message

curl --request GET \
  --url https://api.buildr.com/api/2023-01/webhook_messages/{id} \
  --header 'Authorization: <authorization>'

{
  "webhook_message": {
    "id": "msg_1srOrx2ZWZBpBUvZwXKQmoEYga2",
    "event_type": "opportunity.create",
    "event_id": "evt_pNZKtWg8Azow",
    "payload": {
      "id": "787",
      "url": "https://example.com/787"
    },
    "timestamp": "2019-08-24T14:15:22Z"
  }
}