Icinga Director Automation fileshipper

Icinga Director
1

Hello!
I need to create Sync rule for import Hosts from json file. But I cannot to find properties how I can import _override_servicevars like

vars["_override_servicevars"] += {
    check_disk_aix = {
        CRT_Assignee = "3"
    }

My Properties is below

image
image801×282 4.32 KB

but I get
image
Is it possible to import _override_servicevars for host object?
Thanks!