pageTitle = jsonParam['title']
pageToModify = None

if(pageTitle == None):
    pageToModify = Document.ActivePageReference
else:
    for page in Document.Pages:
        if(page.Title == pageTitle):
            pageToModify = page
            break

if pageToModify != None:
    pageToModify.ApplyLayout(Enum.Parse(clr.GetClrType(TileMode),jsonParam['tileMode']))
