netplay

Something like that in your functions.php

add_action( 'wp_footer', 'mycustom_wp_footer' );
function mycustom_wp_footer() {
 ?>
<script>
document.addEventListener( 'wpcf7mailsent', function( event ) {
   if ( 'FORM-ID-HERE' == event.detail.contactFormId ) {
var liPixelSrc = "https://dc.ads.linkedin.com/collect/?pid=XXXXX&conversionId=XXXXXX&fmt=gif";  
    var liPixel = new Image();      
    liPixel.src = liPixelSrc;   
    return false; 
  };  
}, false );
</script>	
<?php
}