Web Hook Not working

For the tracking of the registered member, we used this datalayer trigger and it should trigger after successful 
registration so we have written in ‘um_registration_complete’ hook, but its not working however php code is working properly

add_action( ‘um_registration_complete’, ‘my_registration_complete’, 10, 2 );
function my_registration_complete( $user_id, $args ) {
    echo “<script type=\”text/javascript\”> 
            window.dataLayer = window.dataLayer || [];
            window.dataLayer.push({
                ‘event’: ‘sign_up’,
                ‘status’: ‘success’,
            });
</script>”;
}