Show article.
An event dispatched when an article is opened.
eventName - viewShow
viewName - article or packagePreview
moduleID - Module ID from app config
moduleName - Module name
moduleTitle - Module title from app config
articleHeadline - Article headline
articleUUID - Article UUID
articleUrl - Article URL
isFrequency - Boolean, whether article is metered.
isPremium - Boolean, whether article is premium content.
source - String, if the article was opened from a push notification.
Example - Event dispatched when an article with title of "Title of an Amazing Article" is opened.
eventName: viewShow
viewName: article
moduleID: topnews
moduleName: SectionContentList
moduleTitle: Top News
articleHeadline: Title of an Amazing Article
articleUUID: cc6bad82-1a84-4c65-bcc4-f8a551851c2d
articleUrl: Article's URL
isFrequency: false
isPremium: true
source: