curl --request GET \
  --url https://{subdomain}.nudj.cx/api/v2/admin/campaigns \
  --header 'x-api-token: <api-key>'

{
  "totalCount": 123,
  "edges": [
    {
      "id": "<string>",
      "organisationId": "<string>",
      "name": "<string>",
      "startDate": "<string>",
      "endDate": "<string>",
      "createdAt": "<string>",
      "updatedAt": "<string>",
      "createdBy": "<string>",
      "updatedBy": "<string>"
    }
  ]
}