post
https://sandboxapi.legendtrading.com/v2/app/kyc/individual/qa
提交问卷调查答案 (Submit Questionnaire Answers)
保存用户的问卷答案。请注意，答案结构将根据用户所在国家/地区有所不同。
Submit the user's questionnaire answers. Note: The answer structure varies based on the user's country/region.