Webhook output JSON data

Hi,
I am upgraded grafana from version 7 to 9. After upgrading our alert system can not work properly. Grafana version 7 webhook output is JSON but Grafana 9 webhook output different types. I need grafana 9 version webhook result as JSON. Please help me, how i get grafana version 9 webhook output as JSON data.

THANK YOU!!

~ the grafana team