curl --location --request POST 'http://mp.xipuduo.com/index.php/Retail/HappyGroup/useSuccess_v4' \
--form 'group_id="1"' \
--form 'bill_id="[\"1\",\"2\"]"' \
--form 'parent_id="11"' \
--form 'merchant_id="1"' \
--form 'sign="123456"'{
"status": 1,
"msg": "操作成功"
}