campaign.send_rejected{
"event": "campaign.send_rejected",
"timestamp": "2026-07-15T09:02:10Z",
"account_id": 11073,
"location_id": "279381",
"data": {
"campaign_id": "8f3a1c72-..",
"customer_id": "a9..",
"message_id": "e4..",
"channel": "sms",
"message_type": "SmsMessage",
"reason": "Insufficient SMS credits"
}
}curl --location 'https://your-api-server.com' \
--header 'X-Synup-Signature: sha256=Base64Signature==' \
--header 'Content-Type: application/json' \
--data '{
"event": "campaign.send_rejected",
"timestamp": "2026-07-15T09:02:10Z",
"account_id": 11073,
"location_id": "279381",
"data": {
"campaign_id": "8f3a1c72-..",
"customer_id": "a9..",
"message_id": "e4..",
"channel": "sms",
"message_type": "SmsMessage",
"reason": "Insufficient SMS credits"
}
}'{}