b, _ := json.Marshal(jsonMap["features"])
features := growthbook.ParseFeatureMap(b)
contextGB := growthbook.NewContext().
	WithFeatures(features).
	WithAttributes(growthbook.Attributes{
                "Key": ID,
            })
gb := growthbook.New(contextGB)
if gb.Feature("backend_enable_digilocker").On {
            log.Println("FEATURE IS ON")
}

"features": {
        "manual_upload_button_visibility": {
            "defaultValue": true,
            "rules": [
                {
                    "variations": [
                        true,
                        false
                    ],
                    "weights": [
                        0.5,
                        0.5
                    ],
                    "key": "manual_upload_button_visibility",
                    "hashAttribute": "linkID"
                }
            ]
        },
        "backend_enable_digilocker": {
            "defaultValue": false,
            "rules": [
                {
                    "variations": [
                        false,
                        true
                    ],
                    "weights": [
                        0.5,
                        0.5
                    ],
                    "hashAttribute": "linkID"
                }
            ]
        }
    }