An app item represents an content object owned by an application. It can group files and folders together from different paths. That set can be shared via a collaboration.
12345678The unique identifier for this app item.
app_itemThe value will always be app_item.
Value is always app_item
hubsThe type of the app that owns this app item.
{
  "id": "12345678",
  "type": "app_item",
  "application_type": "hubs"
}