function add_to_sequence_shortcode( $args ) {

    $post_data  = array(
        'objectID' => 0,
        'add_list' => $args['id'],
        'ids'      => wp_fusion()->user->get_contact_id()
    );

    $params             = wp_fusion()->crm->get_params();
    $params['method']   = 'PUT';
    $params['body']     = json_encode( $post_data );

    $response = wp_remote_post( 'https://api.ontraport.com/1/objects/sequence', $params );

    if( is_wp_error( $response ) ) {
        return $response;
    }

}

add_shortcode( 'add_to_sequence', 'add_to_sequence_shortcode' );