Access task information without using a form

Summary

Is there a way to access information passed into the task, outside of creating a form or using execData.longSummary/execData.shortSummary

Content

We have created a process that uses VBCS as the front end, so there is no need for us to create Forms for our tasks.

I need to pass to a task 3 data attributes, orderId, supplierOrderId and orderURL, so that this information can be visible to the email notification. I am mapping orderId to execData.longSummary and supplierOrderId to execData.shortSummary, but have found the only want to have visibility to a 3^rd (or any more) data attributes, in my case orderURL, is to create a form and map it there, so it can be seen via the API’s payload.