curl --request POST \
--url https://developersandbox-api.flutterwave.com/internal/charges/v2-webhook-update \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"txId": 123,
"txRef": "<string>",
"tenantId": "<string>",
"accountId": 123
}
'