on x compact, SFOS 3.2.1.20, the key is in the 10th byte and the value (press/release) is in the 12th. (each key press/release produces 16 bytes)

just cat it to a file, press a single key, ctrl+c, and then read the bytes (with hexdump or something). do it 3x with the same key, and 3x with a different key and compare/contrast