curl --location --request PUT 'https://api.conexteo.com/messages/1234/cancel' \
--header 'X-APP-ID: <api-key>' \
--header 'X-API-KEY: <api-key>'
{
"id": 0,
"message_type": {},
"scheduletimestamp": "2019-08-24T14:15:22Z",
"scheduledate": "2019-08-24",
"scheduletime": "10:10:10",
"content": "string",
"sender": "string",
"state": "string",
"recipients_count": 0,
"credits_required": 0,
"shorturl_mode": "string",
"shorturl_url": "string"
}