curl --location --request POST 'https://saas-open.vhall.com/v3/interacts/sign/batch-delete' \
--header 'platform;' \
--data-urlencode 'sign_ids=370942,370940,370939,370938' \
--data-urlencode 'webinar_id=509154312' \
--data-urlencode 'app_key=' \
--data-urlencode 'sign_type=' \
--data-urlencode 'signed_at=' \
--data-urlencode 'sign='
{}