Request specific data manipulation

$generateHMACFromRequest(algorithm, key, nonce)

Generates hash-based message authentication code (HMAC) using base64 encoding

$x_client_project: $generateHMACFromRequest(sha256, mySecretKey, myMessage)

Example above will fill each case header X-Client-Project value with generated HMAC.
For example: X-Client-Project: aGCRmhIRJSqLwAZ7akdiQM5+tQI+QWSeygcrccFZeYg=