Submit new comment with metadata

Hi There!

Does anyone know how to post a comment with a “metadata”?

I already seen this interesting post about how to post comment using this plugin
http://ww.wp.xz.cn/support/topic/plugin-json-api-how-to-add-a-comment-or-post?replies=4

but I can’t find a solution to submit a metadata too.

Thanks for your support

http://ww.wp.xz.cn/plugins/json-api/