[
  {
    "description": "treehash per file (base64 encoded rather than base64url)",
    "signed_content": {
      "payload": "eyAgImNvbnRlbnRfaGFzaGVzIjogWyAgICB7ICAgICAgImJsb2NrX3NpemUiOiA0MDk2LCAgICAgICJoYXNoX2Jsb2NrX3NpemUiOiA0MDk2LCAgICAgICJmb3JtYXQiOiAidHJlZWhhc2giLCAgICAgICJmaWxlcyI6IFsgICAgICAgIHsgICAgICAgICAgInBhdGgiOiAibWFuaWZlc3QuanNvbiIsICAgICAgICAgICJyb290X2hhc2giOiAiLXZ5eUlJbjdpU0N6ZzdYM0lDVUk1d1phM3RHN3c3dnlpQ2NreFpkSkdmcyIgICAgICAgIH0sICAgICAgICB7ICAgICAgICAgICJwYXRoIjogImJhY2tncm91bmQuanMiLCAgICAgICAgICAicm9vdF9oYXNoIjogInR4SGlHNUtRdk5vUE9TSDVGYlFvOVpiNWdKMjNqM29GQjBSdTlET256aXciICAgICAgICB9LCAgICAgICAgeyAgICAgICAgICAicGF0aCI6ICJmb28vYmFyLmh0bWwiLCAgICAgICAgICAicm9vdF9oYXNoIjogIkwzN0xGYlRfaG10eFJMN0FmR1pOOVlUcFc2eW96X1ppUTFvcExKbjFOWlUiICAgICAgICB9LCAgICAgICAgeyAgICAgICAgICAicGF0aCI6ICJsb3dlcmNhc2UuaHRtbCIsICAgICAgICAgICJyb290X2hhc2giOiAiSHBMb3RMR0NtbU9kS1l2R1FtRDNPa1hNS0dzNDU4ZGJhblk0V2NmQVpJMCIgICAgICAgIH0sICAgICAgICB7ICAgICAgICAgICJwYXRoIjogIkFMTENBUFMuSFRNTCIsICAgICAgICAgICJyb290X2hhc2giOiAiYmwtZVY4RU5vd3Z0dzZQMTRENFgxRVAwbWxjTW9HLV9hT3g1bzlDMTM2NCIgICAgICAgIH0sICAgICAgICB7ICAgICAgICAgICJwYXRoIjogIk1peGVkQ2FzZS5IdG1sIiwgICAgICAgICAgInJvb3RfaGFzaCI6ICJ6RUFPOUZ3Y2lpZ01OeTNOdFUyWE5iLWRTNVRRTW1WTngwVDloN1d2WGJRIiAgICAgICAgfSwgICAgICAgIHsgICAgICAgICAgInBhdGgiOiAibUl4ZWRjQXNlLkh0bWwiLCAgICAgICAgICAicm9vdF9oYXNoIjogIm5LUnFVY0pnMV9RWldBZUNiNHVGZDVvdUMwTWN1R2F2S3A4VEZEUnFCZ2ciICAgICAgICB9ICAgICAgXSAgICB9ICBdLCAgIml0ZW1faWQiOiAiYWJjZGVmZ2hpamtsbW5vcGFiY2RlZmdoaWprbG1ub3AiLCAgIml0ZW1fdmVyc2lvbiI6ICIxLjIuMyJ9",
      "signatures": [
        {
          "header": {"kid": "publisher"},
          "protected": "eyJhbGciOiJSUzI1NiJ9",
          "signature": "whatever"
        },
        {
          "header": {"kid": "webstore"},
          "protected": "eyJhbGciOiJSUzI1NiJ9",
          "signature": "SEHL2Dlere3Dyus1mom5Q1eqn0wUUlReAZzSwlYGy9Y1MJyGzkTc2fY8OGq4pWUMhxXda6knyZmK9GsNWl55ikCqVS/fmG9QPXdh2rx6Pt3HbDy/nlWhYN7c+Cjx0NCWr3pzze/4bWy64HTb/BTK8zaEqYLp+JBJkb/xp8/1kHFHgeDiDBxyPsZey8Z59PD2en5MQyLZi8VEiqfXbztVClBjau0S9GGn0IpKIj6FpgeIkR3z2YxkUg22BBk7+Mqxy/2bHtncu0c57tcg2OkCrGKCR45W6r89FXqO/cHf0cYi/NHcMjgqul+hFrJwO6i09C16lS9J5+OWc5bR+TxJnA=="
        }
      ]
    }
  }
]