How to use include escape character '\' in LB and RB in web_reg_save_param

Hi,

I want to capture Flight ID. The response generated contains '\' in it, below is a sample response:-

{"d":["{\"First\":\"Flight Name\",\"Second\":\"Flight ID;Destination;Destination ID;xxx;yyy\"}"]}

 How to include '\' in web_reg_save_param?