[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"
    }
}

    "http-upgrade" => {
        "type" => OBJECT,
        "description" => "HTTP Upgrade specific configuration",
        "expressions-allowed" => false,
        "required" => false,
        "nillable" => true,
        "value-type" => {
            "enabled" => {
                "type" => BOOLEAN,
                "description" => "Flag that indicates HTTP Upgrade is enabled, which allows HTTP requests to be upgraded to native remoting connections",
                "expressions-allowed" => false,
                "required" => false,
                "nillable" => true,
                "default" => false
            },
            "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
            }
        },
        "access-type" => "read-write",
        "storage" => "configuration",
        "restart-required" => "no-services"
    }