final LocalDate ld = new LocalDate(2013,5,1);
final LocalDateTime ldt = new LocalDateTime(2013,2,1,14,15,0);
final DateTime dt = new DateTime(2013,2,1,14,15,0);
final String s = "New string";
argRepr.mapPut("localDateProperty.value", asIsoNoT(ld.toDate()));
argRepr.mapPut("localDateTimeProperty.value", asIso(ldt.toDate()));
argRepr.mapPut("dateTimeProperty.value", asIso(dt.toDate()));
argRepr.mapPut("stringProperty.value", s);
final RestfulResponse<JsonRepresentation> result = client.follow(updateLink, argRepr);