HAsh mc

$data = {eventType:cip.paid,operationNumber:691044,data:{cip:2522080,currency:PEN,amount:100.00}};

$secret = BeoemtkgvJoFtaCOCbV4ltFrNXWjup6sVLUJohUmH3mk6xdI;

$signature = hash_hmac(sha256,$data,$secret);

echo $signature;