Ensure to copy your n8n workflow and paste it in the code block, that is in between the pairs of triple backticks, which also could be achieved by clicking </> (preformatted text) in the editor and pasting in your workflow.
```
<your workflow>
```
That implies to any JSON output you would like to share with us.
Just recently I replied to the posts addressing issues with binary files. I think your use case can benefit from those answers. Please check out the following posts:
But is there any possibility to not convert binary to text and then back to binary? I have some checks right after webhook node that are not present here so it’s impossible to send binary straight from it. But if my file will weight like 200 mb, will it work good on server with 2gb ram?