Sitenavigationelement

Hi,

How can i add sitenavigationelement in rankmath
I have add the schema but it is not showing anything. here my code

{“@context”:”http://schema.org”,
“@type”:”SiteNavigationElement”,
“”:
[
{
“@type”:”SiteNavigationElement”,
“position”:1,
“name”: “Home”,
“description”: “Sample page1.”,
“url”:”https://www.website.com/home”
},
{
“@type”:”SiteNavigationElement”,
“position”:2,
“name”: “Service page”,
“description”: “Sample page2.”,
“”url”:”https://www.website.com/service”
}
]
}

I don’t know how to setup this. Please guide us!