curl --request GET \
  --url https://api.topsort.com/public/v1/campaign-service/restriction-types \
  --header 'Authorization: Bearer <token>'

{
  "restrictionTypes": [
    {
      "id": 123,
      "interactionType": "impressions",
      "frequencyType": "daily",
      "level": "campaign"
    }
  ]
}