curl --request POST \
  --url https://api.belio.co.ke/message/{serviceId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "type": "SendToEach",
  "messages": [
    {
      "text": "<string>",
      "phone": "<string>"
    }
  ],
  "receiptRequest": {
    "correlator": "<string>",
    "callbackUrl": "<string>"
  }
}'

{
  "desc": {
    "requestId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "units": {
      "Safaricom": 123,
      "Airtel": 123
    },
    "addresses": {
      "Safaricom": 123,
      "Airtel": 123
    }
  }
}