Optionalobject_Optionalsubject_The unique ID of the Story defined as subject. At least one of object_story_id or subject_story_id must be present.
How the subject Story acts on the object Story. This can be one of: "blocks", "duplicates", "relates to"
The unique ID of the Story defined as object. At least one of
object_story_idorsubject_story_idmust be present.