First of all, thanks for your time, and thank you; for reading, and answering this question.
We have been creating inside an HTTP Operation, a way to generate a JWT as follows:
set header = "{""alg"":""HS256""}"$$$LOGINFO("header: "_header)
set payload = "{""username"":"""_user_""", ""requestID"":"""_pRequest.idPeticion_"""}"$$$LOGINFO("payload: "_payload)
set key = ##class(Util.TablasMaestras).getValorMaestra("PDF_LABORATORIO","secretKey_JWT")
$$$LOGINFO("key: "_key)
set base64header = $system.Encryption.Base64Encode(header)
$$$LOGALERT("base64header: "_base64header)
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