curl --request POST \
  --url https://api.aimtell.com/prod/site/{idSite}/welcome/upsert \
  --header 'Content-Type: application/json' \
  --header 'X-Authorization-Api-Key: <api-key>' \
  --data '
{
  "title": "<string>",
  "body": "<string>",
  "link": "<string>",
  "status": "0",
  "customIcon": "<string>",
  "customImage": "<string>",
  "conversion_trigger": {
    "eventCategory": "<string>",
    "eventAction": "<string>"
  },
  "actions": {
    "a01": {
      "title": "<string>",
      "link": "<string>"
    },
    "a02": {
      "title": "<string>",
      "link": "<string>"
    }
  }
}
'

{
  "result": "success",
  "message": "Updated welcome message succesfully."
}