Annotations are additional key-value pair metadata that are associated with an object.
|id||STRING||ID of the object to which this annotation belongs|
|etag||STRING||Etag of the object to which this annotation belongs. To update an AnnotationV2, this field must match the current etag on the object.|
|annotations||MAP<STRING,AnnotationsValue>||Additional metadata associated with the object. The key is the name of your desired annotations. The value is an object containing a list of string values (use empty list to represent no values for key) and the value type associated with all values in the list|