OpenManage Enterprise Powershell API put

Hi,

I am playing around with OpenManage Enterprise API with PowerShell and I can't get the put commands to work for updating networks?

Based on the documentation updating existing values is as easy as 

PUT Used to update a speci€c instance or create a specific€ resource instance with a specific€ identifier.
PUT /AccountService/Accounts('1414')

Example taken from Docs

PUT method for Networks(Id)
	This method updates an existing network.
Description Updates a network.
	Privilege TEMPLATE_MANAGEMENT
HTTP response
	codes
	200
Example Input:
{
 "Id": 43614,
 "Name": "abc-1",
 "Description": "abc-updated",
 "VlanMaximum": 22,
 "VlanMinimum": 19,
 "Type": 1
}

Snippet of my code some variables not shown.

$uri = "https://
  
   /api/NetworkConfigurationService/Networks(26392)"
   

   
$obj = Invoke-RestMethod -Uri $uri -Method get -Credential $cred
   

  
$jsonblock = @{
  
   id = $obj.Id
   Description= "Server VLAN"
}
$body = (ConvertTo-Json $jsonblock)
$response = Invoke-RestMethod -Uri $uri -Method Put -Body $body -ContentType 'application/json' -Credential $cred

Invoke-RestMethod : {"error":{"code":"Base.1.0.GeneralError","message":"A general error has occurred. See ExtendedInfo for more 
information.","@Message.ExtendedInfo":[{"MessageId":"CGEN1006","MessageId":"CGEN1006","RelatedProperties":[],"Message":"Unable to complete the operation because the 
requested URI does not exist or the requested Method is not implemented for the URI.","MessageArgs":[],"Severity":"Critical","Resolution":"Enter a valid URI and retry 
the operation."}]}}

What am I missing?

 

Cheers