CreateMoTransaction
- amountType: numberrequired
Amount for the transaction
- productType: string
_id requiredMO Product ID
- callbackType: string
_url Optional callback URL
- communicationType: string
_method Communication method (default: email)
- externalType: string
_id External ID reference
- offerType: string
_id Optional MO Offer ID (para seguimiento local)
- receiverType: string
Receiver identifier (default: user email)