lastNum

Example response

{
  "0": {
    "8000000000000000": {
      "filehash": "B9FA20E270F55B5E0C885A69E4B40FDD0FFAA0BF38FE987D94052B2590402547",
      "roothash": "418264A61CB1B059AC257E20959AD9084C7311D5E3DE6BDF80A3998D00CECD1E",
      "seqno": 35473945
    }
  },
  "-1": {
    "8000000000000000": {
      "filehash": "B60455CC5ED20A3866DAF1430D90DF6C2EEBBFAEDD31003162BF0F103E960F6D",
      "roothash": "8D644B4AB7D5BBA49FC2659CF737DBAD635450FF399F4BC4CFB840C39694CB9A",
      "seqno": 29801410
    }
  }
}