@ApiMethod(name = "sayHi")
public MyBean sayHi(@Named("name") String name) {
    MyBean response = new MyBean();
    response.setData(name);
    return response;
}

public MyBean sayHi(MyBean testBean)

public class MyBean {

private String myData;
private byte[] imageByte;

public void setData(){

}
public String getData() {
    return myData;
}

public void setData(String data1) {
    myData = data1;
}

public void setImageByte(byte b[]){
    imageByte = b;
}

public byte[] getImageByte() {
    return imageByte;
}
}