{
    "keys": [
        {
            "kty": "oct",
            "alg": "A128KW",
            "k": "GawgguFyGrWKav7AX4VKUg"
        },
        {
            "kty": "oct",
            "k": "AyM1SysPpbyDfgZld3umj1qzKObwVMkoqQ-EstJQLr_T-1qS0gZH75aKtMN3Yj0iPS4hcgUuTwjAzZr1Z9CAow",
            "kid": "HMAC key used in JWS spec Appendix A.1 example"
        }
    ]
}