如何在JPA中持久化List<List<Object>>类型的属性？

@Entity
public class EntityName {
    @Id
    private Long id;

    @ElementCollection
    @CollectionTable(name = "table_name")
    private List<List<Object>> propertyName;

    // getters and setters
}

@Entity
@Table(name = "table_name")
public class Element {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @ElementCollection
    @OrderColumn(name = "index_column")
    private List<Object> elements;

    // getters and setters
}

@Entity
public class EntityName {
    @Id
    private Long id;

    @OneToMany(cascade = CascadeType.ALL)
    @JoinColumn(name = "entity_id")
    private List<Element> propertyName;

    // getters and setters
}

@Repository
public interface EntityNameRepository extends JpaRepository<EntityName, Long> {
}

@Service
public class EntityNameService {
    @Autowired
    private EntityNameRepository entityNameRepository;

    public void saveEntity(EntityName entity) {
        entityNameRepository.save(entity);
    }
}