u16 size/offset of the below ID data. Normally this is 0x7. When this is <=10, this field is the size of the below ID data. When this is >10, this is the offset of the 10-byte ID data, relative to structstart+4+<offsetfield-10>. It's unknown in what cases this 10-byte ID data is used.
Unknown u8, normally 0x0.
Unknown u8, normally 0x2.
ID data. When the above size field is 0x7, this is the 7-byte NFC tag UID, followed by all-zeros.