{
  "keys": [
    {
      "kty": "oct",
      "kid": "test-hmac-384",
      "k": "W3mR8v_MP0_YdDo1OB0uwOgPX6-7PzkICVxMDVCZlPGw3vyPr8SRb5akrRSNU-zV"
    },
    {
      "kty": "oct",
      "kid": "test-hmac-512",
      "k": "U4kMAa7tBwKOD4ggab4ZRGeHlFTILgNbescS1b5nambKJPmrB7QjeTryvfrE8zjYSvLxW2-tzFJUpk38a6FjPA"
    }
  ]
}