在Backand中如何从node.js操作上传文件？

I'm experiencing problems with the Upload feature. Here's my case. I have: a SQL query, a node.js action that generates .xlsx report using that query, and an upload action to store generated report. My problem is that if I invoke upload action from the node.js code (using BackandSdk), the file content is written in octets rather than actual binary data. But when I invoke it from browser with exactly the same JSON body, everything works just fine. Here's an excerpt from the downloaded file:I'm experiencing problems with the Upload featu