SeriesReaderSettingsResponse
A user's content-setting overrides for one series.
Sparse: a field is absent when the user has not overridden it, and the reader inherits instead. For reading direction that means the series metadata and then the library default.
Settings that describe the device rather than the content, such as fit mode and page layout, are deliberately not here. They belong to the screen in front of the reader, not to the file, and each client keeps its own.
readingDirectionReadingDirection
Reading direction for this series, for this user only
Possible values: [ltr, rtl, ttb, webtoon]
SeriesReaderSettingsResponse
{
"readingDirection": "ltr"
}