Form with File Upload and Webhook - No Filename, extension or content type

I have a form with some text fields and a file upload field.
The form has a webhook that sends the submitted information to a url in json format.

Currently the configuration is set to send file content (base64) but how do I get the file name of the uploaded file? - I allow for multiple file types (extensions) hence I require that to convert the base64 string back to a file.

I have noticed that, if I configure the form to not store the submission, I do not get the file content (makes sense) but I get the file name.