Zoom Phone API - Asset Library

I have a few questions regarding the Zoom Phone API method "Add an audio item for text-to-speech conversion" seen here: https://developers.zoom.us/docs/api/rest/reference/phone/methods/#operation/AddAnAudio . We were able to successfully send the post request and received the audio name and ID back in return, but where exactly is this audio item going? We cannot find it in our asset library under "Phone System Management". Any insight on this API method would be helpful.