<GetUsageStats>
   <Version>integer</Version>
   <RequesterCredentials>
      <Token>string</Token>
      <UserToken>string</UserToken>
      <DeveloperName>string</DeveloperName>
   </RequesterCredentials>
   <Filters>
      <StartDate>date</StartDate>
      <EndDate>date</EndDate>
      <CallType>string</CallType>
   </Filters>
</GetUsageStats>