curl --request DELETE \
  --url https://api.salesbricks.com/api/v2/subscriptions/{subscription_id}/pause \
  --header 'X-SALESBRICKS-KEY: <api-key>'

{
  "error": {
    "code": "ERR_BAD_REQUEST",
    "message": "Bad request — the input payload is malformed, missing required fields, or contains invalid data.",
    "details": {
      "fields": {
        "paused_at": [
          "This field is required."
        ]
      }
    }
  }
}