mutation SaveArticleReadingProgress($input: SaveArticleReadingProgressInput!) {
    saveArticleReadingProgress(input: $input) {
        ... on SaveArticleReadingProgressSuccess {
            updatedArticle {
                id
                readingProgressPercent
                readingProgressAnchorIndex
            }
        }
        ... on SaveArticleReadingProgressError {
            errorCodes
        }
    }
}
