Add Star Ratings for Product Review

ratings.json

{
    "@context": "http://schema.org",
    "@type": "Review",
    "itemReviewed": {
        "@type": "Product",
        "name": "Hello Product review"
    },
    "reviewRating": {
        "@type": "Rating",
        "ratingValue": "5.0",
        "bestRating": 5
    },
    "author": {
        "@type": "Person",
        "name": "Santhosh veer"
    },
    "reviewBody": "Hello product - Let's Say Hello and Let's Review them."
}