curl --request POST \
  --url https://api.pictify.io/webhook-subscriptions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "targetUrl": "<string>",
  "platform": "custom",
  "filters": {
    "templateId": "<string>",
    "bindingId": "<string>"
  }
}
'

{
  "subscription": {
    "uid": "<string>",
    "targetUrl": "<string>",
    "filters": {
      "templateId": "<string>",
      "bindingId": "<string>"
    },
    "deliveryCount": 123,
    "failureCount": 123,
    "lastDeliveryAt": "2023-11-07T05:31:56Z",
    "createdAt": "2023-11-07T05:31:56Z",
    "secret": "<string>"
  }
}