How to get raw payload that is submitted to URL via `FlashbotsSendBundle`

[sirgarfieldc]

I have been seeing intermittent errors like

unexpected end of JSON input
invalid character '<' looking for beginning of value

for bundle submission.

I would like to log raw payload that is submitted to URL via FlashbotsSendBundle. So I can send builder the data and workout why this happen.

Is there a debug mode that would allow me to do this ?

[TangMonk]

did you fix it out?