magento 2 in postman in get product in remove this symbol array

1
2  "product": {
3    "sku": "00004244",
4    "extension_attributes": {
5    	"category_links": [
6    		{
7    			"position": 0,
8    			"category_id": "2"
9    		},
10    		{
11    			"position": 1,
12    			"category_id": "42"
13    		},
14    		{
15    			"position": 2,
16    			"category_id": "52"
17    		},
18    		{
19    			"position": 3,
20    			"category_id": "56"
21    		}
22    	]
23    },
24    "custom_attributes": [
25    	{
26    		"attribute_code": "category_ids",
27    		"value": "[]"
28    	}
29    ]
30  }
31