[
  "r of set",
  {
    "required": 1,
    "set": [
      [
        "sig",
        {
          "pubkey": "Ai1AiAPyzqZiM4lHNkRXaS8LLB5NoTXjRfAXg8sjRFQ0"
        }
      ],
      [
        "sig",
        {
          "pubkey": "AwBFbhlGBH0MtX4G9pmxUkIjdDyzn3W2Z1q8BpYoulst"
        }
      ]
    ]
  }
]