---

type ValidateMCHDOutput struct {
	Valid       bool            `json:"valid"`
	MCHDData    *MCHDData       `json:"mchdData,omitempty"`
	ErrorKey    i18n.MessageKey `json:"errorKey,omitempty"`
	ErrorParams map[string]any  `json:"errorsParams"`
}

return &ValidateMCHDOutput{
			Valid:    false,
			ErrorKey: i18n.MsgSystemError,
		}