curl --request POST \
  --url https://dashboard.hologram.io/api/1/sms/incoming/ \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "fromnumber": "<string>",
  "body": "<string>",
  "base64body": "<string>",
  "deviceid": 123,
  "deviceids": [
    123
  ],
  "phonenumber": "<string>"
}
'

{
  "success": true,
  "data": {
    "msgcount": 123
  }
}