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    "ID": 1,
    "MailboxIDList": [
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      2,
      3,
      4
    ],
    "UnlockID": 9960
  },
  {
    "ID": 2,
    "MailboxIDList": [
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      6,
      7,
      8
    ],
    "UnlockID": 9963
  },
  {
    "ID": 3,
    "MailboxIDList": [
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    ],
    "UnlockID": 9964
  },
  {
    "ID": 4,
    "MailboxIDList": [
      10
    ],
    "UnlockID": 9969
  }
]