Example for /r/Powershell user, json issues + ps 5.1

Get-LACountyParcel.ps1

function Get-LACountyParcel {
    <#
    .EXAMPLE
    Get-LACountyParcel -Parcel <id>
    #>
    [CmdletBinding()]
    param(
        $Parcel
    )
    try {
        # regex removes any property from the json that has 'null', to resolve the duplicate 'SubPartNumber' values.
        $regex = [regex]::new('\x22\w+\x22:null\,')
        # if it's only SubPartNumber that is the issue could swap to below line
        # $regex = [regex]::new('"SubPartNumber":null\,')
        $Request = Invoke-RestMethod -Uri "https://portal.assessor.lacounty.gov/api/parceldetail?ain=$Parcel"
        if ($Request -is [String]) {
            # problems parsing the json, attempting to replace and convert.
            $json = $Request -replace $regex | ConvertFrom-Json
            return $json.Parcel
        } else {
            return $Request.Parcel
        }
    } catch {
        throw $_
    }
}