[
  "r of set",
  {
    "required": 1,
    "set": [
      [
        "sig",
        {
          "pubkey": "A4l4z8N81nF8IhlgLHlRV2xYvboIojkLtb+wS19Ab4d6"
        }
      ],
      [
        "sig",
        {
          "pubkey": "Auz8o01amAAQiXI6L+oIcZiHWckHICbFc9HwZWeteZBT"
        }
      ]
    ]
  }
]