hook into admin add order item 2f product on add 2fsubmit

1<?php
2// define the woocommerce_ajax_add_order_item_meta callback 
3function action_woocommerce_ajax_add_order_item_meta( $item_id, $item ) {     
4  // make action magic happen here... 
5};          
6// add the action 
7add_action( 'woocommerce_ajax_add_order_item_meta', 'action_woocommerce_ajax_add_order_item_meta', 10, 2 );