{
  "type": "object",
  "properties": {
    "7-bit": {
      "type": "string",
      "contentEncoding": "7-bit"
    },
    "8-bit": {
      "type": "string",
      "contentEncoding": "8-bit"
    },
    "binary": {
      "type": "string",
      "contentEncoding": "binary"
    },
    "quoted-printable": {
      "type": "string",
      "contentEncoding": "quoted-printable"
    },
    "base-16": {
      "type": "string",
      "contentEncoding": "base-16"
    },
    "base-32": {
      "type": "string",
      "contentEncoding": "base-32"
    },
    "base-64": {
      "type": "string",
      "contentEncoding": "base-64"
    }
  },
  "required": ["7-bit", "8-bit", "binary", "quoted-printable", "base-16", "base-32", "base-64"]
}