theoretically it would be possible using the web component…
however the web component does not support multipart/formdata, i.e. a mixture of binary data and text, so the web component unfortunately is not able to do it
you could try to use the Terminal / Shell Extension by @Juan_Antonio , but I’m not sure, if this will be possible there… you might want to try it and let us know, what you find out…
EDIT
this should be doable using the web component...
I'm not sure, if you can use dictionaries as replacement for list of lists?
in the request header you forgot your credentials after "Bearer", see also this example App Inventor Tutorials and Examples: Dropbox | Pura Vida Apps
you might want to provide a screenshot of your updated blocks
Taifun
Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by
Taifun.