wp_ajax_atd_settings

See hook in action

See this hook used in plugins:

Select Pluginjetpack.6.2.1jetpack.6.4.2jetpack.6.5jetpack.6.6.1jetpack.6.7jetpack.6.8jetpack.6.8.1jetpack.6.9jetpack.7.0jetpack.7.0.1jetpack.7.1.1jetpack.7.2jetpack.7.2.1