OptionalexpandOptionalexpires_A future timestamp after which the link will no longer be usable, or now to expire the link immediately.
OptionalmetadataSet of key-value pairs that you can attach to an object. This can be useful for storing additional information about the object in a structured format. Individual keys can be unset by posting an empty value to them. All keys can be unset by posting an empty value to metadata.
Specifies which fields in the response should be expanded.