One of these setups might work depending on what you need.
All targets should of course be your actor.
The first one is simplest to do. Since it just moves the actor. However since it just places it, you need to set the delay timer low to make it seem smooth. Or else it will move “laggy”
The second one is to make the ball a pawn, and assigning ai to it, and then get it to move. Here the refresh just need to happen before it reaches the destination. You need to setup movement for the ball though.
The third setup involves a timeline, wherein you make a vector line. Leave y and constant, and set x to be the same value (not zero) all the way over. If you vary it, the ball will roll faster/slower depending on the slope on the curve.