curl --request POST \
  --url https://sandbox-platform.jupico.com/v1/transactions/echeck/void \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "subMerchantId": "jpt-sim-md-1",
  "transactionId": "You need to change *this* with token from SALE operation"
}
'

import requests

url = "https://sandbox-platform.jupico.com/v1/transactions/echeck/void"

payload = {
    "subMerchantId": "jpt-sim-md-1",
    "transactionId": "You need to change *this* with token from SALE operation"
}
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    subMerchantId: 'jpt-sim-md-1',
    transactionId: 'You need to change *this* with token from SALE operation'
  })
};

fetch('https://sandbox-platform.jupico.com/v1/transactions/echeck/void', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

const url = 'https://sandbox-platform.jupico.com/v1/transactions/echeck/void';
const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    subMerchantId: 'jpt-sim-md-1',
    transactionId: 'You need to change *this* with token from SALE operation'
  })
};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error(err));

{
  "data": {
    "status": "<string>",
    "transactionId": "<string>",
    "operation": "<string>",
    "subMerchantId": "<string>",
    "amount": 123,
    "balanceAmount": 123,
    "customerId": "<string>",
    "parentId": "<string>",
    "referenceNumber": "<string>",
    "referenceId": "<string>",
    "taxAmount": 123,
    "txDate": "<string>",
    "description": "<string>",
    "dynamicFee": {
      "fixed": 123,
      "discountRatePerc": 123
    },
    "paymentMethod": {
      "cc": {
        "card": {}
      },
      "eCheck": {
        "accountType": "<string>",
        "routingNumber": "<string>",
        "accountNumberLast4": "<string>",
        "checkNumber": "<string>",
        "checkType": "<string>",
        "bankAccToken": "<string>"
      }
    },
    "billing": {
      "address": "<string>",
      "city": "<string>",
      "zipCode": "<string>",
      "state": "<string>",
      "email": "<string>",
      "name": "<string>",
      "phone": "<string>"
    },
    "approvalNumber": "<string>",
    "shipping": {
      "address": "<string>",
      "city": "<string>",
      "zipCode": "<string>",
      "state": "<string>",
      "email": "<string>",
      "name": "<string>",
      "phone": "<string>"
    },
    "paymentToken": {
      "type": "<string>",
      "token": {
        "provider": "<string>",
        "token": "<string>",
        "accountType": "<string>",
        "routingLast4Digits": "<string>",
        "accountLast4Digits": "<string>",
        "accountHolderName": "<string>"
      }
    }
  },
  "success": true,
  "message": "<string>",
  "code": "<string>"
}