I'm seeing a lot of these in the XML file:
<Permission Role="Admin" Propagate="True" Principal="VSPHERE.LOCAL\Administrator" Group="False" EntityType="Object[]" Entity="Datacenters Datacenters"/><Permission Role="Admin" Propagate="True" Principal="VSPHERE.LOCAL\Administrator" Group="False" EntityType="Object[]" Entity="Datacenters Datacenters"/><Permission Role="AutoUpdateUser" Propagate="True" Principal="VSPHERE.LOCAL\AutoUpdate" Group="True" EntityType="Object[]" Entity="Datacenters Datacenters"/><Permission Role="Admin" Propagate="True" Principal="VSPHERE.LOCAL\Administrators" Group="True" EntityType="Object[]" Entity="Datacenters Datacenters"/><Permission Role="Admin" Propagate="True" Principal="Lab\VMware_Admins" Group="True" EntityType="Object[]" Entity="Datacenters Datacenters"/><Permission Role="ReadOnly" Propagate="True" Principal="Lab\Tier1" Group="True" EntityType="Object[]" Entity="Datacenters Datacenters"/>
Of all the entries in my XML with EntityType="Object[]", they all appear to be for the Datacenters Entity only.