{
   "name" : "hello",
   "lastModified" : 1438167001716
}

type Model struct {
    Name         string    `json:"name"`
    Lastmodified time.Time `json:"lastModified"`
}

type Model struct {
    Name   string `json:"name"`
    Millis int64  `json:"lastModified"`
}

func (m Model) Lastmodified() time.Time {
    return time.Unix(0, m.Millis * int64(time.Millisecond))
}

type Model struct {
    Name         string   `json:"name"`
    Lastmodified javaTime `json:"lastModified"`
}

type javaTime time.Time

func (j *javaTime) UnmarshalJSON(data []byte) error {
    millis, err := strconv.ParseInt(string(data), 10, 64)
    if err != nil {
        return err
    }
    *j = javaTime(time.Unix(0, millis * int64(time.Millisecond)))
    return nil
}