WordPress at a glance
filter is not described

customize_save_response filter-hook . WP 4.2.0

Filters response data for a successful customize_save Ajax request.

This filter does not apply if there was a nonce or authentication failure.

Usage

add_filter( 'customize_save_response', 'filter_function_name_2671', 10, 2 );
function filter_function_name_2671( $response, $this ){
	// filter...

	return $response;
}
$response(array)
Additional information passed back to the 'saved' event on wp.customize.
$this(WP_Customize_Manager)
WP_Customize_Manager instance.

Where the hook is called

WP_Customize_Manager::save()
wp-includes/class-wp-customize-manager.php 2520
$response = apply_filters( 'customize_save_response', $response, $this );

Where the hook is used (in WP core)

wp-includes/customize/class-wp-customize-nav-menu-setting.php 482
add_filter( 'customize_save_response', array( $this, 'amend_customize_save_response' ) );
wp-includes/customize/class-wp-customize-nav-menu-item-setting.php 756
add_filter( 'customize_save_response', array( $this, 'amend_customize_save_response' ) );