{
	"odata.type": "Xpertdoc.Portal.Batch",
	"BatchGroupId": "00000000-0000-0000-0000-000000000000",
	"BatchId": "00000000-0000-0000-0000-000000000000",
	"CreatedByUserProfileId": "00000000-0000-0000-0000-000000000000",
	"CreatedDate": "2016-01-01T00:00:00.0000000Z",
	"Description": "",
	"EndTime": "2016-01-01T00:00:00.0000000Z",
	"ErrorMessage": null,
	"ExecutedByUserProfileId": "00000000-0000-0000-0000-000000000000",
	"InputMetadata": "",
	"IsArchived": false,
	"ModifiedByUserProfileId": "00000000-0000-0000-0000-000000000000",
	"ModifiedDate": "2016-01-01T00:00:00.0000000Z",
	"Name": "New Name",
	"OutputMetadata": null,
	"StartTime": "2016-01-01T00:00:00.0000000Z",
	"Status": "Completed",
	"Timestamp": "AAAAAAAEqbA=",
	"WorkerName": "Xpertdoc.DocumentServices.AzureService_IN_0"
}

var batch = portalContext.Batches.Where(b => b.BatchId == Guid.Parse("00000000-0000-0000-0000-000000000000")).FirstOrDefault ();

batch.Name = "New Name";
batch.ValueToChange = value;

portalContext.Update(batch);
portalContext.SaveChanges();