curl --request GET \
  --url https://api.hubapi.com/email/public/v1/campaigns

{
  "hasMore": true,
  "offset": "<string>",
  "campaigns": [
    {
      "id": 123,
      "appId": 123,
      "appName": "<string>",
      "lastUpdatedTime": 123
    }
  ]
}