curl \
--request PUT 'http://test.api.fygi.store/external/api/discount-codes/{discountCodeExternalId}/campaign' \
--header "authorization: $API_KEY" \
--header "Content-Type: application/json" \
--data '{"externalIds":["string"]}'
curl \
--request PUT 'http://test.api.fygi.store/external/api/discount-codes/{discountCodeExternalId}/campaign' \
--header "authorization: $API_KEY" \
--header "Content-Type: text/json"
curl \
--request PUT 'http://test.api.fygi.store/external/api/discount-codes/{discountCodeExternalId}/campaign' \
--header "authorization: $API_KEY" \
--header "Content-Type: application/*+json"