{
	"@odata.context": "https://portal.xpertdoc.com/odata4/v6/$metadata#BatchGroups/$entity",
	"BatchGroupId": "00000000-0000-0000-0000-000000000000",
	"Name": "New Name",
	"Description": null,
	"EnableBatchArchiving": false,
	"BatchHistoryCount": 0,
	"BatchHistoryTimeInMillis": 0,
	"CreatedByUserProfileId": "00000000-0000-0000-0000-000000000000",
	"CreatedDate": "2016-01-01T00:00:00.0000000Z",
	"ModifiedByUserProfileId": "00000000-0000-0000-0000-000000000000",
	"ModifiedDate": "2016-01-01T00:00:00.0000000Z",
	"Timestamp": "AAAAAAAEqd4="
}

var batchGroup = portalContext.BatchGroups.Where(b => b.BatchGroupId == Guid.Parse("00000000-0000-0000-0000-000000000000")).FirstOrDefault ();

batchGroup.Name = "New Name";
batchGroup.ValueToChange = value;
	
portalContext.UpdateObject(batchGroup);
portalContext.SaveChanges();