$user = 'demouser@customer1'
$pass = ''
$upload_url='/controller/CustomDashboardImportExportServlet'

$webclient = New-Object System.Net.WebClient
$webclient.Credentials = New-Object System.Net.NetworkCredential($user,$pass)

$newAppName='NewApp'

$item='C:\Users\testuser1\Desktop\test.json'
$modified='C:\Users\testuser1\Desktop\modified.json'

(Get-Content $item).replace('{{APP_NAME}}', $newAppName) | Set-Content $modified


try
{
    $uri = New-Object System.Uri($upload_url)
    $responseArray = $webclient.UploadFile($uri, $modified)
    $responseJSON = [System.Text.Encoding]::ASCII.GetString($responseArray)

    echo $responseJSON

    if (( $responseJSON | ConvertFrom-Json).success)
    {
        echo "Success"
    }
    else
    {
        echo "Failed"
    }


}
catch
{
    $err=$_
    Write-Host $error.exception.message
}