How to make Zimbra soap api request for sendmsg?

Question

Zimbra

Good afternoon, tell me how to correctly compose the minimum set of tags for sending a message through the soap api?
At the moment, the email is sent with these tags, but it's just an empty email with a subject.

<soap:Body>
    <SendMsgRequest xmlns="urn:zimbraMail">
      <m su="subject test">
               <e a="[email protected]" t="t" />
      </m>
    </SendMsgRequest>
  </soap:Body>

How to add text to email and attachment file?
https://files.zimbra.com/docs/soap_api/8.8.8/api-r... link to the list of commands needed by Sendmsg in the zimbramail service