订阅消息-用户私信通知-私信内容 thing2.DATA有什么字数或者类型上的限制吗？

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订阅消息-用户私信通知-私信内容 thing2.DATA有什么字数或者类型上的限制吗？Subscription message-user private message notification-private message content thing2. Are there any restrictions on the number of words or types of DATA?

Is there any limitation on the number of words or type of subscription message - user private message notification - private message content thing2.data? I can't find the description in the template. If the length is too long, it can't be sent out. I doubt whether there are special symbols or type restrictions

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