Management attributes (which are part of a management request) are mapped by including all request parameters of the HTTP request as attributes. So if an operation supports certain attributes, query parameters can be added to the request URL to be used as attributes of the management request.
Example 2.6. Attributes first-name and last-name as request parameters
http://localhost:8080/rest/private/managed-components/foo/bar?first-name=john&last-name=doe
Management attributes can be multi-valued (meaning more than one value associated with an attribute). This is easy as HTTP query parameters can be multi-valued as well.
Example 2.7. Multi-valued attribute colors as request parameters
http://localhost:8080/rest/private/managed-components/foo/bar?colors=red&colors=green&colors=blue