// course.json
"_bookmarking": {
    "_isEnabled": true,
    "_level": "page" | "block" | "component",
    "_showPrompt": true,
    "title": "Bookmarking",
    "body": "Would you like to continue where you left off?",
    "_buttons": {
        "yes": "Yes",
        "no": "No"
    }
}

// contentObjects.json - will override course.json for each contentObject - _type "page" only, if set. Set _isEnabled false if no bookmarking on page
"_bookmarking": {
    "_isEnabled": true,
    "_level": "inherit" | "page" | "block" | "component"
}