PowerShell script to create a contact in Microsoft CRM 2011 via REST/ODATA

Below is a PowerShell function to create a contact in CRM 2011. Hope it is helpful to some one.

FUNCTION JBM-CRM-CreateContact {
PARAM(
    [string][ValidateSet("crmserver.company.com", "dev-crmserver.company.com")]$ServerName="crmserver.company.com",
    [string][string][ValidateSet("CRMOrganizationName")]$OrganizationName="CRMOrganizationName",
    [string][parameter(Mandatory=$true)]$FirstName,
    [string][parameter(Mandatory=$true)]$LastName,
    [string]$MiddleName,[string]$Suffix,[string]$Email,[string]$JobTitle,
    [string]$Telephone,[string]$Description,[string]$ParentCustomerId,[string]$Address_Line1,[string]$Address_Line2,
    [string]$Address1_Country,[string]$Address1_PostalCode,[switch]$MyDebug
    )

$ContactInfo = @{
FirstName=$FirstName
LastName=$LastName
MiddleName=$MiddleName
Suffix=$Suffix
EMailAddress1=$Email
NickName=$NickName
JobTitle=$JobTitle
Telephone1=$Telephone
Address1_Line1=$Address_Line1
Address1_Line2=$Address_Line2
Address1_City=$Address1_City
Address1_PostalCode=$Address1_PostalCode
Address1_Country=$Address1_Country
Description=$Description
}
if (!($ParentCustomerId -eq "")){
$ContactInfo.Add("ParentCustomerId" , @{Id=$ParentCustomerId;LogicalName= "account"})
}

if ($MyDebug){
$ParentCustomerId
$ContactInfo
}

$assembly = [Reflection.Assembly]::LoadWithPartialName("System.Web.Extensions")
$json=new-object System.Web.Script.Serialization.JavaScriptSerializer
$ContactInfoData=$json.Serialize($ContactInfo)

$url="http://$ServerName/$($OrganizationName)/xrmservices/2011/OrganizationData.svc/ContactSet"
 
$http_request = New-Object -ComObject Msxml2.XMLHTTP
$http_request.open('POST', $url, $false)
$http_request.setRequestHeader("Accept", "application/json")
$http_request.setRequestHeader("Content-Type", "application/json; charset=utf-8")
$results=$http_request.send($ContactInfoData)
if ($MyDebug){
$http_request.statusText
$http_request
}
$ContactId=$($json.DeserializeObject($http_request.responseText)).d.ContactId
return $ContactId
}