发送订阅消息，参数如下：一直报错argument invalid! data.character_string1.value i ？{     "template_id": "t313ynk7i9SFGsD12mnToIjVxP7R5xYsT8HfMIaNeCY",     "page": "/mine-module/my-purchase/purchase-detail?orderSn=S_1671339911573798912",     "touser": "ouo0_4yzYQEbBRRMCMmScH_pA3XM",     "data": "{\"amount5\":{\"value\":1000},\"date8\":{\"value\":\"2019-12-03\"},\"character_string1\":{\"value\":1},\"thing11\":{\"value\":\"回收成功\"},\"phrase2\":{\"value\":\"已预约\"}}",     "miniprogram_state": "trial",     "lang": "zh_CN" } character_string1 换成纯数字，纯字母，英文数字混合，符号混合都不行