The number indicates part 4719 - bicycle frame.
As you can see, it has a straight handlebars and kickstand. Your particular piece must have been modified to fit some specific purpose. Lego does not reuse the same mold numbers much, and never on the purpose, so I highly doubt if it was molded that way.
The closest I could think of in 4 x 4 size would be Turntable 4 x 4 Square Base, Locking. It doesn't feature a stud in the center and has this ring on top, unfortunately. However, depending on your use case center hole still could be used to attach whatever you are building.