How to train my customized obj

[WHHHHY]

Thanks for your excellent work and open it ！
I had trained yolox for a customized obj，but how get .json for gdrnet/self6dpp like this:

And, if this .json file needs to convert something via Convert_det_results_to_bop.py, how to ensure that the input format meets the input requirements of Convert_det_results_to_bop.py