Create or update a promotion

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