' and the first of the keywords should describe the primary focus of the content. The content should be at least 350 words. Do not include the title, excerpt, or meta description in the JSON. The JSON should only contain the 'content', 'keywords', 'popularity_score', and 'is_trash' fields, and the 'content' field must include all the original HTML tags and shortcodes. The rewritten content should have a keyword density between 1-2.5%. The 'is_trash' field should be either true or false. The 'popularity_score' field should be an integer between 1 and 100.