When a Form is filled out, the Response is sent to the Form Response Object axsy_forms__Form_Response__c. To access the raw JSON for a particular Form Response you need to add the 'Response Data' field to the Page Layout of the Axsy Smart Form Response Object on Salesforce.

Edit the Form Response Object's Page Layout 

1. Navigate to Setup > Object Manger > Form Response > Page Layout > Form Response Layout and drag and drop Response Data field into the Details Section. Save your changes. 

It may take a few minutes for the Response Data field to be added to the Form Response Object.  

2. Navigate back to a Form Response record to view/capture the raw JSON Form Response.