push notifications - material - need json format

Hi All,

I'm able to push notifications to http listener from ECC system via gateway for material collection  ,

Reference :

http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/20cea26b-8675-2f10-fa96-d4875f49b05b?overridelayout=t…

Here I'm getting resoponse in XML format but how  to get JSON format ..

Pl suggest ?

Regards,

Lokeswar .