Upload file to linkedin

Hi!
I need to upload image/video to linkedin cloud using this steps:
1. Register an upload for Image
2. Upload the Image
3. Check status of upload

I use Bubble for frontend, but i cant do that via api connector because i need send binary file. But i created it on postman and it works well. Here the screenshot
[Снимок экрана 2022-05-06 в 16.24.53.png]my question is: how i can implement the same logic for this scenario:
• Upload video on bubble frontend and receive S3 link
• Send this link to Xano and encode it to binary file
• Send binary file to Linkedin API

Thanks!