Zabbix is unable to set “Content-type: application/json” HTTP header

[Mick]

I'm trying to make a web scenario that will test login page. I checked this using Fiddler and in POST which is sent is added to the "Content-type: application/json" HTTP header you can not do in a web scenario Zabbix 2.2.1 if anyone could me how to solve this problem., Or maybe there is some other mechanism or whether it is possible to implement this in zabbixie 2.2.1

Please give me some advice

Regards Mick