Zoho Forms subform integration with CRM through Zoho Flow

Zoho Forms subform integration with CRM through Zoho Flow

I have a form with Zoho Forms that includes a subform. 
I am integrating this form with CRM using Zoho Flow, and in CRM I have a similar subform that needs to be mapped with the information from the zoho forms subform. 
If I simply map it using the default parameters it gives me a Zoho CRM says "Invalid input for Subform_1. The expected input type is jsonarray."

How do I go about converting the data output of a subform from Zoho Forms to be properly mapped into Zoho CRM?