Create or update a promotion

curl --request POST \
     --url https://app.amberflo.io/payments/pricing/amberflo/account-pricing/promotions/absolute_product_item_sales_event_promotion \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '{
     "id": "",
     "type": "absolute_product_item_sales_event_promotion",
     "promotionName": ""
     }'