{
  "type": "m.room_key_bundle",
  "content": {
    "room_id": "!Cuyf34gef24t:localhost",
    "file": {
      "v": "v2",
      "url": "mxc://example.org/FHyPlCeYUSFFxlgbQYZmoEoe",
      "key": {
          "alg": "A256CTR",
          "ext": true,
          "k": "aWF6-32KGYaC3A_FEUCk1Bt0JA37zP0wrStgmdCaW-0",
          "key_ops": ["encrypt","decrypt"],
          "kty": "oct"
      },
      "iv": "w+sE15fzSc0AAAAAAAAAAA",
      "hashes": {
        "sha256": "fdSLu/YkRx3Wyh3KQabP3rd6+SFiKg5lsJZQHtkSAYA"
      }
    }
  }
}