Air carrier pilot reported uneven runway surface condition caused the nose wheel to lift off prematurely during takeoff roll. Flight crew rejected take off.

Narrative

After push back and engine start ground notified us of a runway change from 5R to 23L. We taxied B; C to hold short of C1 so we could brief the runway change and the close out. Once complete we taxied to runway 23L. Cleared for take off the positive transfer of controls were completed with all checklists. Shortly after thrust set on take off roll the nose wheel hit an uneven surface on the runway and started to lift off prematurely. I added additional forward force to lower the nose. Upon the nose wheel reaching the runway surface the nose wheel struck another uneven surface and elevated again more aggressively. At this moment the Captain assumed control of the aircraft and positive transfer of control was completed and a rejected take off procedure conducted. The reject was accomplished at 100 knots. We talked to MMMX control and requested to taxi clear of the runway. The decision was made to return to gate for a maintenance inspection of the landing gear. The gate we returned to was XX and appropriate checklists were conducted for shutdown. A maintenance entry was made.Cause: First flight for Person A in to MMMX; mitigation through adding information about runway conditions in company notes.