Mapear dois atributos em uma foreign no Hibernate

CREATE TABLE cen_ligacao(
id serial primary key,
id_usuario int REFERENCES bas_usuario(id),
tempo int not null,
relato varchar
);

CREATE TABLE cen_ligacao_pacote_prospecto(
id_ligacao int,
id_pacote int,
id_prospecto int,
PRIMARY KEY(id_ligacao, id_pacote, id_prospecto),
FOREIGN KEY(id_ligacao) REFERENCES cen_ligacao(id)
);

@Table(name = "cen_ligacao")
@Entity
public class Ligacao {
	
	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private Integer id;
	
	@ManyToOne
	@JoinColumns( {@JoinColumn(name="id_ligacao"),
					@JoinColumn (name = "id_prospecto"), 
					@JoinColumn(name = "id_pacote" )}
	)
	private PacoteProspecto pacoteProspecto;
	
	@ManyToOne
	@JoinColumn(name = "id_usuario")
	private Usuario usuario;
	
	private Integer tempo;
	
	private String relato;

@Id
	@ManyToOne
	@JoinColumn(name = "id_pacote")
	private Pacote pacote;
	
	@Id
	@ManyToOne
	@JoinColumn(name = "id_prospecto")
	private Prospecto prospecto;

	private Boolean disponivel;