contact/sync width custom checkbox field.

[duskohu]

Hi, I trying create or update contact with custom checkbox field. I don't know what is wrong.
Can you suggest me?

        $list_id = 1;
        $ac = new \ActiveCampaign('...','.......');

        $contact = array(
            "email" => "example@example.com",
            "p[{$list_id}]" => $list_id,
            "status[{$list_id}]" => 1, 
        );

        $contact['field'] = array(
            '%NEWSLETTER%,0' => 1 // custom checkbox field name Personalization tag
        );

        $contact_sync = $ac->api("contact/sync", $contact);