curl --location --request POST 'https://saas-open.vhall.com/v3/interacts/sign/batch-delete' \
--data-urlencode 'sign_ids=370942,370940,370939,370938' \
--data-urlencode 'webinar_id=509154312' \
--data-urlencode 'app_key=' \
--data-urlencode 'sign={{sign}}' \
--data-urlencode 'signed_at={% mock 'timestamp' , 's' %}' \
--data-urlencode 'sign_type=0'{}