Adding multiple realm roles to a user, via REST API

I can add a single new role to a user via the realm-mappings endpoint eg


posting the role as the body eg

id: some-id
name: some-role-name

However, can I add multiple roles via a single request? I’d like to send a body like

{id: some-id, name: some-role-name},
{id: some-other-id, name: some-other-role-name},

Couldn’t find the answer in docs, and couldn’t do this via the above endpoint. Is this possible with some other endpoints?