How to get the entity logical name of an entity in CRM by URL ?

RetrieveAllEntitiesRequest allEntitiesRequest = new RetrieveAllEntitiesRequest();
allEntitiesRequest.EntityFilters = EntityFilters.Entity;
allEntitiesRequest.RetrieveAsIfPublished = true;
RetrieveAllEntitiesResponse allEntitiesResponse = (RetrieveAllEntitiesResponse)IOrgService.Execute(allEntitiesRequest);



string entityLogicalName = string.Empty;
foreach (EntityMetadata entityMetadata in allEntitiesResponse.EntityMetadata)
{
try
{
// Try to retrieve the record from the current entity
Entity test = IOrgService.Retrieve(entityMetadata.LogicalName, objectguid, new Microsoft.Xrm.Sdk.Query.ColumnSet(true));
// if the previous instruction didn't throw an exception means that the record exists.
entityLogicalName = entityMetadata.LogicalName;
break;
}
catch
{

}
}