Create category with custom fields (json)

I’m trying to create a category with custom fields, the category is created successfully but the custom fields are not being setted.

I’m using /wp-json/wp/v2/categories endpoint with POST method, Content-Type: application/json, the body is:

{"description":"test description","link":"http://domain/category/test/","name":"Test","slug":"test","parent":0,"meta":[],"fields":{"image":108}}

The response is:

{"id":15,"count":0,"description":"","link":"http:\/\/domain\/category\/Test\/","name":"Test","slug":"Test","taxonomy":"category","parent":0,"meta":[],"acf":[],"_links":{"self":[{"href":"http:\/\/domain\/wp-json\/wp\/v2\/categories\/15"}],"collection":[{"href":"http:\/\/domain\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"http:\/\/domain\/wp-json\/wp\/v2\/taxonomies\/category"}],"wp:post_type":[{"href":"http:\/\/domain\/wp-json\/wp\/v2\/posts?categories=15"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

The “acf” field is empty, can anyone provide me an example about how to make the call?

Thanks!