Gets requested properties for an existing history given its unique key.
readHistory Parameter Descriptions
| Parameter Name | Data Type | Description | 
| uniqueKey | string | Unique key of the record to read. | 
| properties | List<String> | A list of String values that identify the property names whose values to return with the resulting history record. | 
readHistory Response Descriptions
| Parameter Name | Data Type | Description | 
| history | A history record. Only specified property values are returned with the record. | 
history for more information about the properties you can retrieve for the record