Post Message to Number
POST https://{{et_subdomain}}.rest.marketingcloudapis.com/sms/v1/messageContact/{{sms_message_id}}/send
Initiates a message to one or more mobile numbers.
Request Body
{"Subscribe"=>true, "Resubscribe"=>true, "mobileNumbers"=>["12223334444"], "keyword"=>"IMG", "Override"=>true, "messageText"=>"Override!"}