Get AssignmentHeadlineInsight

{
    "data": {
        "id": "FID001",
        "type": "AssignmentHeadlineInsight",
        "attributes": {
            "courseVersion": "string",
            "isCourseVersionLatest": true,
            "items": 0,
            "completed": 0,
            "pendingReview": 0,
            "meanTimeSpentInMillis": 0,
            "maxTimeSpentInMillis": 0,
            "meanAttemptScore": 0,
            "numAttempts": 0
        },
        "relationships": {}
    }
}