How to find the MP4 field name for "Album ID"?

Hello, I am creating a filter to look for tracks that have an "Album ID" field set. This field is created by iTunes. Can you help me to figure out, what the MP4 (Tag 2) field name is for "Album ID" to use in the filter?

not %2{Album ID} equals ""

As an example for the iTunes-specific tags, notice "Artist ID" and "Album ID" in the screenshot.