Signature Pad URL to google sheets


I have built a bubble app for a client that needs tenants to sign PDF lease documents. I populate a google sheet via bubble API, then use document studio to create the PDF with the information in the google sheet. This works fine with text field. I have added a signature plugin that saves a tenants signature to their user field. this signature URL is sent through to the google sheet, but after the PDF is created it only shows the string of text and not the image.
Is there any ideas or suggestions on how I can send through an image via API to my google sheet in a format that will pull through onto my PDF?

thanks in advance,

Found the solution. It was a sizing issue on the image itself when pulled into the PDF.