{
  "header_blocks":
  [
    {
      "headers": [
        { "custom-key": "custom-header" }
      ],
      "encoded": [
        "4088 25a8 49e9 5ba9 7d7f 8925 a849 e95a",
        "728e 42d9"
      ],
      "dynamic_table": [
        { "custom-key": "custom-header" }
      ],
      "table_size": 55
    }
  ]
}
