Convert to time in Golang from milliseconds

I have a some json data where there is a field called lastModifed contains time in millis. I wanted to convert this data into a struct type with json.UnMarshaller. I have mapped the field with json filed. But the conversion seems not working.

IE :

My Json looks like this:

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

and struct Looks like

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

looks not converting the time properly. how can i get the time from those millis??

NB: The millis of lastModifiedTime are getting from java System.currentTimeMillis();