messagebird not sending whatsapp message

Question

I am using below code send whatsapp message. This is messagebird code. response coming success but, i am not receiving any messages in whats app.

curl -X "POST" "https://conversations.messagebird.com/v1/send" \
-H "Authorization: AccessKey wpoPce55Ww97ZIdkdk5kg4oRH7fhC" \
-H "Content-Type: application/json" \
--data '{
  "to": "+919853092550",
  "from": "913df0a1-e1e9-4531-ad60-6d360db610c834",
  "type": "text",
  "content": {
    "text": "Hello!"
  }
}'

response:

{"id":"0f1ff66b63df47dfa178531c004014be","status":"accepted","fallback":null}

Please take a look