Encountering an error while attempting to create an Azure DevOps service connection using PowerShell script(REST API).

Question

Currently working on creation of service connection of authentication type workload Identity federation using Azure DevOps REST API by using PS script.

Below is the script

$organization = "Organization"

$pat = "PersonalAccessToken"

$url = "https://dev.azure.com/$organization/_apis/serviceendpoint/endpoints?api-version=7.2-preview.4"

$jsonPayload = @{

type = "AzureRM"

name = "CONNECTION_NAME"

description = "CONNECTION_DESCRIPTION"

serviceEndpointProjectReferences = @(

    @{

        name = "CONNECTION_NAME"

        projectReference = @{

            id = "ADO_PROJECT_ID"

            name = "ADO_PROJECT_NAME"

        }

    }

)

data = @{

    environment = "AzureCloud"

    scopeLevel = "Subscription"

    creationMode = "Manual"

    subscriptionId = "AZ_SUBSCRIPTION_ID"

    subscriptionName = "AZ_SUBSCRIPTION_NAME"

}

authorization = @{

    scheme = "WorkloadIdentityFederation"

    parameters = @{

        serviceprincipalid = "CLIENT_ID"

        tenantid = "TENANT_ID"

    }

}
```} | ConvertTo-Json

$response = Invoke-RestMethod -Uri $url -Method Post -Headers @{

```powershell
Authorization = "Basic " + [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(":$pat"))

"Content-Type" = "application/json"
```} -Body $jsonPayload

Write-Output $response

Getting the following error:

Invoke-RestMethod : {"$id":"1","innerException":null,"message":"The guid specified for parameter projectId must not be Guid.Empty.\r\nParameter name: projectId","typeName":"System.ArgumentException, mscorlib","typeKey":"ArgumentException","errorCode":0,"eventId":0} At line:39 char:13 + $response = Invoke-RestMethod -Uri $url -Method Post -Headers @{ + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-RestMethod], WebException + FullyQualifiedErrorId :

The parameter projectID which is assigned correctly but still it is showing **The guid specified for parameter projectId must not be Guid.Empty.**

When I try to print the jsonPayload to know about what value is assigning to the projectID after it is convertToJson . So this is output   
"serviceEndpointProjectReferences":

 [ 

{ **"projectReference": "System.Collections.Hashtable",**  // here the projectID is not assigning 

"name": "managedI-sc" } 

],

So can you please help me with the resolution