Fusion Module Output not usable on the next one

Hello Everyone , 

I am using a HTTP Module that gives a Json Output. 
I am getting the output when i run my scenario & i would like to use a key of the response json object as an input parameter on the next module.

However this is not available for me to use when i edit the scenario. 
Kindly refer the screenshots for your reference below

I already tried to delete & add back the module quite a few time but the issue persists. 

Thanks
Harish