Powershell Remove Everyone From Sharing - Advanced Sharing Permissions

Okay, I'm having some issues removing the Everyone Share permissions from Advanced Sharing on a workstation via Powershell. I need to process this via 100 workstations and a few hundred servers.

I want to recreate this functionality:
net share Test=C:\test /grant:username,Read /cache:none /unlimited
But, using powershell so that I can iterate over multiple workstations and servers

I have figured out how to list the share:
(Get-WmiObject -Class "Win32_LogicalShareSecuritySetting" -ComputerName $COMPUTERNAME -Namespace root\cimv2  -filter "Name='Test'").GetSecurityDescriptor().Descriptor.DACL.Trustee

$share = Get-WmiObject Win32_Share -List -ComputerName $COMPUTERNAME
$share.create($ShareDir, $ShareName, 0).Result

I know that there is Win32_SecurityDescriptor class https://msdn.microsoft.com/en-us/library/aa394402(v=vs.85).aspx
But, I'm really confused about how to configure it.

And I don't want EVERYONE in the Share Permissions. 

I know, I know ... I've searched online over and over and over. This is somewhere that I'm falling short. Scripts that I'm finding online aren't even working.

Thanks for your help.