Load all/multiple fields from entity of certain type
You should be able to use either get or getFields on your entity object if it is derived from ContentEntityBase. 

See: https://drupal.stackexchange.com/a/232219/57

So, after you load the entity:

$fields = $my_entity-&gt;getFields();


Or:

$foo = $my_entity-&gt;get('bar')-&gt;value;