F5 APM portal Access includes HTTP Referer Header?

Hi Everyone, Currently I'm doing HTTP Form Based SSO with APM Module, I want to do SSO for Manage Engine Web Portal (Access via APM Webtop), the difficult part is the Manage Engine Portal require "Referer" header to be included in HTTP POST form send to the server. I want to know if there is a way to include "Referer" header on HTTP POST send from F5 to server when F5 does HTTP Form Based SSO. Below is my configuration HTTP Form SSO:

If I use curl to send the request from CLI, the first time is failed, but is successful the second time. The reason why I want to include "Referer" header I read from this article: https://blogs.manageengine.com/help-desk/servicedesk/2012/09/28/using-curl-to-automate-servicedesk-plus-authentication.html

Does anyone face the same issue or has any idea for that? Really appreciate your help.