退款失败,原因:"{\"amount\":{\"currency\":\"CNY\",\"refund\":1349,\"total\":2000},\"funds_account\":\"AVAILABLE\",\"notify_url\":\"xxxdNotify\",\"out_refund_no\":\"xxx\",\"out_trade_no\":\"xxx\",\"reason\":\"用户退款\",\"transaction_id\":\"4200002425202411013416118896\"}"