"sasl-authentication-factory" => {
        "type" => STRING,
        "description" => "The server side SASL authentication policy to use to secure the interface where the connection is after a HTTP upgrade.",
        "expressions-allowed" => false,
        "required" => false,
        "nillable" => true,
        "capability-reference" => "org.wildfly.security.sasl-authentication-factory",
        "min-length" => 1L,
        "max-length" => 2147483647L
    }

[standalone@localhost:9990 /] /core-service=management/management-interface=http-interface:write-attribute(name=http-upgrade.sasl-authentication-factory, value=application-sasl-authentication)
{
    "outcome" => "success",
    "response-headers" => {
        "operation-requires-reload" => true,
        "process-state" => "reload-required"
    }
}