Can someone tell me which "BOX" (atom) type in a HDS stream I could use to embed custom timeline metadata? I have access to, and can modify, the raw HDS stream. MDAT, MOOF,etc....? The stream will be played back in OSMF, and presumably I can modify BoxParser and HHTPStreamingF4FFileHandler to parse the appropriate box. Presumably this is how CuePoints and such are tunneled from AMS/FMS.