POST: /v1/messages
\{
 "recipient_type": "individual",
 "to": "[recipient-wa-id]",
 "type": "interactive",
 "interactive": {
   "type": "order_details",
   "body": {
     "text": "Your message content"
   },
   "action": {
     "name": "review_and_pay",
     "parameters": {
       "reference_id": "unique-reference-id",
       "type": "digital-goods",
       "payment_type": "br",
       "payment_settings": [\
         {\
           "type": "pix_dynamic_code",\
           "pix_dynamic_code": {\
             "code": "00020101021226700014br.gov.bcb.pix2548pix.example.com...",\
             "merchant_name": "Account holder name",\
             "key": "39580525000189",\
             "key_type": "CNPJ"\
           }\
         }\
       ],
       "currency": "BRL",
       "total_amount": {
         "value": 50000,
         "offset": 100
       },
       "order": {
         "status": "pending",
         "tax": {
           "value": 0,
           "offset": 100,
           "description": "optional text"
           },
         "items": [\
           {\
             "retailer_id": "1234567",\
             "name": "Cake",\
             "amount": {\
               "value": 50000,\
               "offset": 100\
             },\
             "quantity": 1\
           }\
         ],
         "subtotal": {
           "value": 50000,
           "offset": 100
         }
       }
     }
   }
 }
}