Accessing JSON values with the known keys from JSON response

jsonUsingKeys.swift

if let query = json["query"] as? [String:Any] {
    if let pages = query["pages"] as? [String:Any] {
        if let page = pages["30984"] as? [String:Any] {
            if let revisions = page["revisions"] as? [[String:Any]] {
                if let element = revisions[0] as? [String:Any] {
                    if let htmlData = element["*"] as? String {
                        print(htmlData)
                    }
                }
            }
        }
    }
}