magento2: POST product with REST API doesn't save manufacturer attribute

Preconditions

1. magento 2.3.1 CE
2. PHP 7.1.29

Steps to reproduce

I’m able to save a product with a POST request to my REST API endpoint. Now I would like to save manufacture attribute,too. To reproduce this issue send a POST request to insert a product (or a PUT request to update). I prepare this json structure.

{
    	"product": {
    		"sku": "code",
    		"name": "name",
    		"price": 5,
    		"attribute_set_id": 4,
    		"status": 1,
    		"visibility": 1,
    		"extension_attributes": {
    			"stock_item": {
    				"qty": 0,
    				"is_in_stock": false,
    				"is_qty_decimal": false,
    				"min_qty": "0",
    				"qty_increments": "0"
    			}
    		},
    		"custom_attributes": [{
    			"attribute_code": "barcode",
    			"value": "############"
    		}, {
    			"attribute_code": "family",
    			"value": "product family"
    		}, {
    			"attribute_code": "description",
    			"value": "product description"
    		}, {
    			"attribute_code": "category_ids",
    			"value": ["1", "2", "41", "53", "87"]
    		}, {
    			"attribute_code": "manufacturer",
    			"value": "213"
    		}]
    	}
    }

Expected result

I’m expecting that all custom_attributes will be saved to related product

Actual result

This product is saved on my catalog but without manufacturer value, indeed the response about above request is

{
 	"id": 2059,
 	"sku": "code",
 	"name": "name",
 	"attribute_set_id": 4,
 	"status": 1,
 	"visibility": 1,
 	"type_id": "simple",
 	"created_at": "2019-06-17 08:02:23",
 	"updated_at": "2019-06-17 08:02:23",
 	"extension_attributes": {
 		"website_ids": [1],
 		"category_links": [{
 			"position": 0,
 			"category_id": "1"
 		}, {
 			"position": 0,
 			"category_id": "2"
 		}, {
 			"position": 0,
 			"category_id": "41"
 		}, {
 			"position": 0,
 			"category_id": "53"
 		}, {
 			"position": 0,
 			"category_id": "87"
 		}]
 	},
 	"product_links": [],
 	"options": [],
 	"media_gallery_entries": [],
 	"tier_prices": [],
 	"custom_attributes": [{
 		"attribute_code": "description",
 		"value": "description"
 	}, {
 		"attribute_code": "url_key",
 		"value": "name-of-product"
 	}, {
 		"attribute_code": "options_container",
 		"value": "container2"
 	}, {
 		"attribute_code": "barcode",
 		"value": "###########"
 	}, {
 		"attribute_code": "family",
 		"value": "product family"
 	}, {
 		"attribute_code": "required_options",
 		"value": "0"
 	}, {
 		"attribute_code": "has_options",
 		"value": "0"
 	}, {
 		"attribute_code": "category_ids",
 		"value": ["1", "2", "41", "53", "87"]
 	}]
 }