Different Menu in Different Pages - Insecure deserialization

 27 | if (!current_user_can('administrator')) {
 28 | echo wp_json_encode(array('success' => false, 'status' => 'not_administrator', 'response' => ''));
 29 |
 30 | die();
 31 | }
 32 |
 33 | $theme_location = sanitize_key($_POST['theme_location']);
 34 | $assigned_menu = (int) sanitize_key($_POST['assigned_menu']);
 35 | $name = sanitize_text_field(serialize($_POST['name'] ));
 36 |
>  37 |         $name = unserialize($name);
   38 |
   39 |         if(is_array($name)){
   40 |
   41 |
   42 |             //if menu has changed
   43 |             $changed    = sanitize_key($_POST['changed']);
   44 |             $changed_menu   = (int) sanitize_key($_POST['changed_menu']);
   45 |             $changed_theme_location = sanitize_key($_POST['changed_theme_location']);
   46 |
   47 |
      ^ Col 0