A sequence track permits a sequence to be played at a specified time in another sequence.
State (int) - Can this track be recorded into and played, played only, or neither
link - A Meta_Sequence node to be linked to by this track
int - The number of times to play the target sequence
float - The time in seconds to start playing the target sequence, relative to the parent sequence of this track
bool - If true, the target sequence will be played backwards