* Optionally include entity_type param, i.e. 'entity_type' => 'Activity'
* If no entity_type is supplied, it will be determined based on the fields you request.
* If no entity_type is supplied and no fields are specified, 'Contact' will be assumed.
* Optionally include entity_type param, i.e. 'entity_type' => 'Activity'
* If no entity_type is supplied, it will be determined based on the fields you request.
* If no entity_type is supplied and no fields are specified, 'Contact' will be assumed.