curl --request GET \
  --url 'https://api.stateset.com/api/v1/promotions/{id}' \
  --header 'Authorization: Bearer YOUR_API_KEY'

{
  "code": null,
  "created_at": "string",
  "discount_value": null,
  "id": "string",
  "name": "string",
  "promotion_type": "string",
  "status": "string"
}