Juan Cortes commented on Adding new customer metafields in private app

{
    "customer": {
        "id": "268827037",
        "metafields": {
            "key": "what-is-your-height",
            "value": "4'0\" or 121.92 cm",
            "value_type": "string",
            "namespace": "extra_info"
        }
    }
}