curl --request POST \
  --url https://test-api.sandbox.co.in/bank/virtual/accounts/{account_number}/transactions/{transaction_id}/cancel

{
  "timestamp": 123,
  "transaction_id": "<string>",
  "data": {
    "id": "<string>",
    "description": "<string>",
    "created_at": 123,
    "updated_at": 123,
    "@entity": "<string>",
    "failure_reason": "<string>",
    "notes": {},
    "payer": {
      "@entity": "<string>",
      "name": "<string>",
      "bank_account": {
        "@entity": "<string>",
        "notes": {},
        "upi_id": "<string>"
      }
    },
    "payee": {
      "@entity": "<string>",
      "name": "<string>",
      "bank_account": {
        "@entity": "<string>",
        "account_number": "<string>",
        "ifsc": "<string>",
        "notes": {},
        "upi_id": "<string>"
      }
    },
    "status": "<string>",
    "mode": "<string>",
    "type": "<string>",
    "amount": 123,
    "fee": 123,
    "tax": 123
  },
  "code": 123
}