Question How to export an FBX animation as one scene

Hello,

I'm currently working with a rigged mesh and a skateboard which is parented without transforms to the mesh. I animate the rig by going into pose mode, changing the figure, and then inserting a key frame. No problem. Then, I independently rotate the skateboard a bit and save it one the same key frame. The animation runs the way I'd like it too. So, I export it to FBX and the import the asset from Unity.

The problem I'm getting is that the skateboard animation is a separate animation from the rig animation. Because they aren't one single animation, I can't work with them in the animator controller.

Any suggestions?