Spring i rest api

@Entity
public class SportpersontableEvent implements Serializable {
    
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name="sportpersonEventId")
    private Long sportpersontableeventId;
    
    @ManyToOne(fetch = FetchType.LAZY, targetEntity = Sportpersontable.class)
    @MapsId("sportpersonId")
    @JoinColumn(name="sportperson_id", nullable=false) 
    private Sportpersontable sportperson;
  
    @ManyToOne(fetch = FetchType.LAZY, targetEntity = Dyscyplinetable.class)
    @MapsId("dyscyplineId")
    @JoinColumn(name="dyscypline_id", nullable=false)
    private Dyscyplinetable dyscypline;
//getery i setery

@Repository
public interface SportpersonEventRepo extends CrudRepository<SportpersontableEvent, Long> {
 }

@RestController
@RequestMapping("api/sportpersonEvent")
@CrossOrigin
public class SportpersonEventApi {

    @Autowired
    private SportpersonEventManager sportpersonEventManager;

    @PostMapping
    public void add(@RequestBody SportpersontableEvent sportpersontableEvent) {
        sportpersonEventManager.add(sportpersontableEvent);
    }

@Entity
public class Dyscyplinetable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name="dyscyplineId")
    private Long dyscyplineId;
    
    private String name;
    
    private int population;
//getery i setery
}

Entity
public class Sportpersontable implements Serializable{
      
    @Id
    @Column(name="sportpersonId")
    private Long sportpersonId;
    
    @OneToOne
    @MapsId
    private Usertable user;
//getery i setery
}