keystone/api-ref/source/v3/samples/admin/role-create-response.json

{
    "role": {
        "id": "1e443fa8cee3482a8a2b6954dd5c8f12",
        "links": {
            "self": "http://example.com/identity/v3/roles/1e443fa8cee3482a8a2b6954dd5c8f12"
        },
        "description": "My new role",
        "name": "developer",
        "options": {}
    }
}