Enviado:
{
    "paymentMethod": "pix",
    "amount": 50000,
    "customer": {
        "name": "Carlos Milton",
        "email": "carlmin@gmail.com.br",
        "phone": "42984099301",
        "document": {
            "number": "06409190220",
            "type": "cpf"
        }
    },
    "items": [
        {
            "title": "Kit telefone movel",
            "description": "Teste kit",
            "unitPrice": 140000,
            "quantity": 1,
            "tangible": true
        }
    ],
    "postbackUrl": "",
    "isInfoProducts": true
}

Resposta da API:
{"error":"O valor da transferência excede o limite permitido."}