curl --request POST \
  --url https://api.example.com/v2/updates/flats \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "beginExclusive": 123,
  "endInclusive": 123,
  "filter": {
    "filtersByParty": {},
    "filtersForAnyParty": {
      "cumulative": [
        {
          "identifierFilter": {
            "Empty": {}
          }
        }
      ]
    }
  },
  "verbose": true,
  "updateFormat": {
    "includeReassignments": {
      "filtersByParty": {},
      "filtersForAnyParty": {
        "cumulative": [
          {
            "identifierFilter": {
              "Empty": {}
            }
          }
        ]
      },
      "verbose": true
    },
    "includeTopologyEvents": {
      "includeParticipantAuthorizationEvents": {
        "parties": [
          "<string>"
        ]
      }
    }
  },
  "descendingOrder": true
}
'

[
  {
    "update": {
      "OffsetCheckpoint": {
        "value": {
          "offset": 123,
          "synchronizerTimes": [
            {
              "synchronizerId": "<string>",
              "recordTime": "<string>"
            }
          ]
        }
      }
    }
  }
]