{
  "method": "Reserialize fixture claims, retain original signature, recompute HMAC with public fixture key. These are deliberately modified local controls.",
  "rows": [
    {
      "original": "escaped",
      "mode": "compact-utf8",
      "new_payload_bytes": 34,
      "new_payload_sha256": "9b157eaf50f395c211dfeb030c376064ada9c47a53ca1b2b5f2a2fe3917039c1",
      "original_signature_retained": true,
      "hmac_valid": false
    },
    {
      "original": "escaped",
      "mode": "pretty-utf8",
      "new_payload_bytes": 43,
      "new_payload_sha256": "29754849ee758c22094ad59fc351585b8b1a9397969ba622c22b2950523e6dc1",
      "original_signature_retained": true,
      "hmac_valid": false
    },
    {
      "original": "utf8",
      "mode": "compact-utf8",
      "new_payload_bytes": 34,
      "new_payload_sha256": "9b157eaf50f395c211dfeb030c376064ada9c47a53ca1b2b5f2a2fe3917039c1",
      "original_signature_retained": true,
      "hmac_valid": true
    },
    {
      "original": "utf8",
      "mode": "pretty-utf8",
      "new_payload_bytes": 43,
      "new_payload_sha256": "29754849ee758c22094ad59fc351585b8b1a9397969ba622c22b2950523e6dc1",
      "original_signature_retained": true,
      "hmac_valid": false
    },
    {
      "original": "spaced",
      "mode": "compact-utf8",
      "new_payload_bytes": 34,
      "new_payload_sha256": "9b157eaf50f395c211dfeb030c376064ada9c47a53ca1b2b5f2a2fe3917039c1",
      "original_signature_retained": true,
      "hmac_valid": false
    },
    {
      "original": "spaced",
      "mode": "pretty-utf8",
      "new_payload_bytes": 43,
      "new_payload_sha256": "29754849ee758c22094ad59fc351585b8b1a9397969ba622c22b2950523e6dc1",
      "original_signature_retained": true,
      "hmac_valid": false
    }
  ]
}