Modify posted data

Hello,

i am trying to modify the posted data of my form. I have tried adding an action in my functions.php named “wpcf7_before_send_mail”. Inside this action i have tried WPCF7_Submission::get_instance() and get_posted_data() modifying the posted data array but i haven’t got any luck.

Here is my code:

add_action(‘wpcf7_before_send_mail’, ‘mytheme_save_to_getresponse’, 10, 1);
function mytheme_save_to_getresponse($form)
{
try{

// get current SUBMISSION instance
$submission = WPCF7_Submission::get_instance();

// Ok go forward
if ($submission) {

// get submission data
$data = $submission->get_posted_data_TIB();
$data[“yourage”]=33;

}

update_user_meta(1, ‘-log-form’, json_encode((array)$form));
}
catch(Exception $ex){
update_user_meta(1, ‘-log-exception’, $ex->getMessage());
}

return $form;
}

How should i do to modify the posted data?

Thanks!

Regards

Rafael