curl --request POST \
  --url 'https://api.stateset.com/api/v1/promotions' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "code": null,
  "description": null,
  "discount_value": null,
  "ends_at": null,
  "max_uses": null,
  "name": "string",
  "promotion_type": "string",
  "starts_at": null
}'

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