Walker As you know, the Spinebot is on this forum and will give you an immediate answer, but you will not get a good answer if your question is not very specific, so please be detailed about your requirements, including the fact that you are using SkeletonMechanim, to make it easier for us to give you an accurate answer.
When using SkeletonMecanim, events are stored in each AnimationClip and are raised like other Unity animation events. For more information see the following sections of the documentation:
https://esotericsoftware.com/spine-unity-main-components#SkeletonMecanim-Events