{
  / title /         -1: "title of the error",
  / detail /        -2: "detailed information about the error",
  / instance /      -3: "coaps://pd.example/FA317434",
  / response-code / -4: 128, / 4.00 /

  "tag:3gpp.org,2022-03:TS29112": {
    / cause /  0: "machine-readable error cause",
    / invalidParams / 1: [
      [
        / param / "first parameter name",
        / reason / "must be a positive integer"
      ],
      [
        / param / "second parameter name"
      ]
    ],
    / supportedFeatures / 2: "d34db33f"
  }
}