JSON-LD SD main nav menu

<script type='application/ld+json'>
    {
        "@context": "http://schema.org/",
        "@type": "WPHeader",
        "headline": "headline-string",
        "@id":"#header",
        "cssSelector": "#header",
        "potentialAction": [
            {
                "@type": "Action",
                "name": "Login",
                "target": "https://www.squadhelp.com/login"
            },
            {
                "@type": "Action",
                "name": "Sign up",
                "target": "https://www.squadhelp.com/signup"
            }
        ],
        "@graph":
        [
            {
                "@context": "https://schema.org",
                "@type":"SiteNavigationElement",
                "@id":"#header",
                "name": "Premium Domains for Sale",
                "url": "https://www.squadhelp.com/premium-domains-for-sale"
            },
            {
                "@context": "https://schema.org",
                "@type":"SiteNavigationElement",
                "@id":"#header",
                "name": "Naming Contests",
                "url": "https://www.squadhelp.com/branding-marketing-naming-contests"
            },
            {
                "@context": "https://schema.org",
                "@type":"SiteNavigationElement",
                "@id":"#header",
                "name": "Agency Experience",
                "url": "https://www.squadhelp.com/managed-contests"
            },
            {
                "@context": "https://schema.org",
                "@type":"SiteNavigationElement",
                "@id":"#header",
                "name": "Business Name Generator",
                "url": "https://www.squadhelp.com/business-name-generator"
            },
            {
                "@context": "https://schema.org",
                "@type":"SiteNavigationElement",
                "@id":"#header",
                "name": "Business Name Ideas",
                "url": "https://www.squadhelp.com/Name-Ideas"
            },
            {
                "@context": "https://schema.org",
                "@type":"SiteNavigationElement",
                "@id":"#header",
                "name": "Short Domain Names",
                "url": "https://www.squadhelp.com/premium-domains-for-sale/all/length/Short"
            },
            {
                "@context": "https://schema.org",
                "@type":"SiteNavigationElement",
                "@id":"#header",
                "name": "One Word Domains",
                "url": "https://www.squadhelp.com/premium-domains-for-sale/all/type_of_name/One%20Word"
            },
            {
                "@context": "https://schema.org",
                "@type":"SiteNavigationElement",
                "@id":"#header",
                "name": "Industry Domains",
                "url": "https://www.squadhelp.com/industry-domains"
            }
        ]
    }
</script>