How to fletch data from a subform to use with a webhook?

How to fletch data from a subform to use with a webhook?

Hi,

I am wanting to use a webhook to send some data over to Flow.

We got some standard Module Parameters to send across but also need data from a subform that we are using in Deals. 

Is there a way to collect the data from the subform and include it as part of the webhook?