[
  {
    "IndexName": "user_id_1",
    "MgoKeySchema": {
      "MgoIndexKeys": [
        {
          "Name": "user_id",
          "Direction": "1"
        }
      ],
      "MgoIsUnique": false
    }
  },
  {
    "IndexName": "type_muteAllMembers_createTime",
    "MgoKeySchema": {
      "MgoIndexKeys": [
        {
          "Name": "type",
          "Direction": "1"
        },{
          "Name": "mute_all_members",
          "Direction": "1"
        },
        {
          "Name": "create_time",
          "Direction": "-1"
        }
      ],
      "MgoIsUnique": false
    }
  }
]