{
  "keys": [
    {
      "kty": "EC",
      "crv": "P-256",
      "x": "mock_x_coordinate_base64url",
      "y": "mock_y_coordinate_base64url",
      "d": "mock_private_key_base64url",
      "use": "sig",
      "kid": "ai-card-oauth-key-1",
      "alg": "ES256"
    }
  ]
}