public async Task<JObject> GetRecordsWithMainDomainAsync(string mainDomainName)
{
var param = new ApiRequestParameters();
param.AddParameter("Action", "DescribeDomainRecords");
param.AddParameter("DomainName", mainDomainName);
param.GenerateSignature();
var responseStr = await RequestAsync(param);
return JObject.Parse(responseStr);
}