{
	"@odata.context": "http://portal.xpertdoc.com/odata4/v6/$metadata#TemplateGroupDocumentOutputPostActions/$entity",
	"TemplateGroupDocumentOutputPostActionId": "00000000-0000-0000-0000-000000000000",
	"TemplateGroupId": "00000000-0000-0000-0000-000000000000",
	"DocumentOutputPostActionId": "00000000-0000-0000-0000-000000000000",
	"SequenceNumber": 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": "AAAAAAAACew="
}

var groupDopa = portalContext.TemplateGroupDocumentOutputPostActions.Where(tgdopa => tgdopa.TemplateGroupDocumentOutputPostActionId == Guid.Parse("00000000-0000-0000-0000-000000000000")).FirstOrDefault();	
	
groupDopa.Name = "New Name";
groupDopa.ValueToChange = value;

portalContext.UpdateObject(groupDopa);
portalContext.SaveChanges();