https://nlohmann.github.io/json/
void main() {
  json table = R"({"type": "table", "title": "持仓信息", "cols": ["列1", "列2"], "rows": [["abc", "def"], ["ABC", "support color #ff0000"]]})"_json;
  LogStatus("`" + table.dump() + "`");
  LogStatus("第一行消息\n`" + table.dump() + "`\n第三行消息");
  json arr = R"([])"_json;
  arr.push_back(table);
  arr.push_back(table);
  LogStatus("`" + arr.dump() + "`");
  table = R"({
      "type" : "table",
      "title" : "持仓操作",
      "cols" : ["列1", "列2", "Action"],
      "rows" : [
          ["abc", "def", {"type": "button", "cmd": "coverAll", "name": "平仓"}]
      ]
  })"_json;
  LogStatus("`" + table.dump() + "`", "\n`" + R"({"type": "button", "cmd": "coverAll", "name": "平仓"})"_json.dump() + "`");
}