Update product meta via API

Hi there,

first, RankMath is the best plugin for seo 😉 good work guys…

my problem:
I have my own c# app, by witch I create new products and update existing products.
I use this nuget: https://github.com/XiaoFaye/WooCommerce.NET

I know that you can not support by this plugin, but my problem is…

I’ve get product from my page and he has meta_data, where is stored info about (meta_values from wp_postmeta). Example:
– rank_math_title – “product name”
– rank_math_description – “product description”
– rank_math_focus_keyword – “product”
– rank_math_robots – “{[ “index”]}”

When I download product and make no change and make an api call to edit product, I get response:
{“code”:”rest_invalid_param”,”message”:”Neplatn\u00fd parameter: meta_data”,”data”:{“status”:400,”params”:{“meta_data”:”meta_data[5][value] nie je typ string,null.”}}}

MetaData deserialized:
“meta_data”:[
{“id”:8382651,”key”:”manufacturer”,”value”:”SENSILLO”},{“id”:8382652,”key”:”_ean”,”value”:”5902021524495″},{“id”:9847094,”key”:”rank_math_title”,”value”:”Prebaľovacia podložka Sensillo zelená za 11,75EUR”},{“id”:9847095,”key”:”rank_math_description”,”value”:”Prebaľovacia podložka Sensillo zelená”},{“id”:9847096,”key”:”rank_math_focus_keyword”,”value”:”prebaľovacia podložka sensillo zelená”},
{“id”:9847097,”key”:”rank_math_robots”,”value”:[“index”]}
]

Do you have any idea ? Or it is some of default value for “rank_math_robots” ?

thank you