curl --request GET \
  --url https://matcher.sandbox.lerian.net/v1/governance/actor-mappings/{actorId} \
  --header 'Authorization: Bearer <token>'

{
  "actor_id": "user-abc-123",
  "display_name": "John Doe",
  "email": "john.doe@company.com",
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z"
}