All 4 germinated well, I've been using the same method for awhile now.
Soak the seeds in a glass of water for about 12-24 hours, tap them down so they sink every couple hours (if they're floating)
Then remove the seeds and if any have already sprouted they can go directly into soil, in this case all 4 had cracked open but didn't have a taproot exposed so they went into a damp paper towel for another 24 hours, they all had decent tap roots when I checked on them the next day.
Darkness and temperate are key, no light and keeping around 25 degrees Celsius seems to work best for me.