How to put JSONB throught Postgres database with JPA

I am trying to build an REST application using Jersey, Gson, JPA and I would like to put a JSON object to JSON or JSONB database field into Postgres.

I tried to do something like this : How to use Postgres JSONB datatype with JPA? but my table see a 'VARCHAR' type instead of 'JSONB'.

My Entity :

@Entity
@Table(name = "votes")

public class Votes {

@Id
@GeneratedValue
private int id;
private int idSocialChoice;

@Convert(converter=JsonConverter.class)
private JsonObject vote;

public Votes() {
}

public JsonObject getVote() {
    return vote;
}

public void setVote(JsonObject vote) {
    this.vote = vote;
}

public int getIdSocialChoice() {
    return idSocialChoice;
}

public void setIdSocialChoice(int idSocialChoice) {
    this.idSocialChoice = idSocialChoice;
}

How i insert my entity :

Votes votes0 = new Votes();
votes0.setIdSocialChoice(3);

JsonObject object = Json.createObjectBuilder().build();
votes0.setVote(object);

List<Votes> listvotes = new ArrayList<Votes>();
listvotes.add(votes0);

ModelEntities.insertVotes(listvotes);

Method insertVotes :

public static void insertVotes(List<Votes> animalList) {

    CrudServiceBean crudServiceBean = new CrudServiceBean(CrudServiceBean.PU_DB);
    crudServiceBean.newTransaction();

    for(Votes votes : animalList)
        crudServiceBean.create(votes);

    crudServiceBean.commit();

    crudServiceBean.closeTransaction();

}

Method create of crudServiceBean.create :

public  <T> T create(T t) {
    this.em.persist(t);
    this.em.flush();
    this.em.refresh(t);
    return t;
}

My JPA provider create my the schema like this (createDDL_ddlGeneration.sql) :

CREATE TABLE votes (ID INTEGER NOT NULL, IDSOCIALCHOICE INTEGER, VOTE VARCHAR(255), PRIMARY KEY (ID))

I would also avoid to use Hibernate.

Thank you.