Get list of Campaign Enums

{
   "results": [
      {
         "name": "approval-state",
         "value": "Approval State"
      },
      {
         "name": "ad-type",
         "value": "Ad Type"
      },
      {
         "name": "daily-ad-delivery-model",
         "value": "Daily Ad Delivery Model"
      },
      {
         "name": "category",
         "value": "Category"
      }
      // Additional rows (objects) omitted
   ]
}