@Misaki I used the getter methods directly from event object and I was able to get the desired output running 4.3 Godot.
func _on_spine_sprite_animation_event(sprite: SpineSprite, animation_state: SpineAnimationState, track_entry: SpineTrackEntry, event: SpineEvent):
print("Animation event: " + track_entry.get_animation().get_name() + ", " + event.get_data().get_event_name() )
print("Int: ", str(event.get_data().get_int_value()) )
print("Float: ", str(event.get_data().get_float_value()) )
print("String: ", event.get_data().get_string_value() )
func _on_spine_sprite_animation_event(sprite: SpineSprite, animation_state: SpineAnimationState, track_entry: SpineTrackEntry, event: SpineEvent):
print("Animation event: " + track_entry.get_animation().get_name() + ", " + event.get_data().get_event_name() )
print("Int: ", str(event.get_int_value()) )
print("Float: ", str(event.get_float_value()) )
print("String: ", event.get_string_value() )
