curl --request GET \
  --url https://api.hubapi.com/marketing/v3/marketing-events/ \
  --header 'private-app: <api-key>'

{
  "paging": {
    "next": {
      "after": "<string>",
      "link": "<string>"
    }
  },
  "results": [
    {
      "appInfo": {
        "id": "<string>",
        "name": "<string>"
      },
      "attendees": 123,
      "cancellations": 123,
      "createdAt": "2023-11-07T05:31:56Z",
      "customProperties": [
        {
          "name": "<string>",
          "value": "<string>"
        }
      ],
      "endDateTime": "2023-11-07T05:31:56Z",
      "eventCancelled": true,
      "eventCompleted": true,
      "eventDescription": "<string>",
      "eventName": "<string>",
      "eventOrganizer": "<string>",
      "eventStatus": "<string>",
      "eventType": "<string>",
      "eventUrl": "<string>",
      "externalEventId": "<string>",
      "noShows": 123,
      "objectId": "<string>",
      "registrants": 123,
      "startDateTime": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z"
    }
  ]
}