之前一直在用的接口,新加了一个业务,退款接口响应400 Bad Request request body信息 : [{"reason":"","amount":{"total":100,"currency":"CNY","refund":100},"out_trade_no":"122158010843905179-4726-683320","out_refund_no":"122158036315802983-4727-683320","notify_url":"url"}]