keystone/api-ref/source/v3-ext/federation/service-provider/samples/update-request.json

{
    "service_provider": {
        "auth_url": "https://new.example.com/identity/v3/OS-FEDERATION/identity_providers/protocol/saml2/auth",
        "enabled": true,
        "relay_state_prefix": "ss:temp:",
        "sp_auth": "https://new.example.com/identity/Shibboleth.sso/SAML2/ECP"
    }
}