Mocking Postman GET request using axios is giving different results - reactjs

Question

I am trying to mock up the following request , which I have in Postman, into Axios:
in terms of cURL:
curl --location --request GET 'http://url' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer blablabla' \
--data-raw '{
"category":{
"value": "category1"
}
}'
in terms of Nodejs-Request:
var request = require('request');
var options = {
'method': 'GET',
'url': 'http://url',
'headers': {
'Content-Type': 'application/json',
'Authorization': 'Bearer blablabla'
},
body: JSON.stringify({"category":{"value":"category1"}})
};
request(options, function (error, response) {
if (error) throw new Error(error);
console.log(response.body);
});
Note: the first two codes had been generated by Postman.
When I send this request via Postman, and dump the request parametes on the server, I will get the following result:
array:1 [
"category" => array:1 [
"value" => "category1"
]
]
in terms of Axios:
var config = {
params: {
category:
{
value: 'category1'
}
},
headers: {
'Authorization': 'Bearer blablabla'
}
};
return Axios.get('http://url', config);
While dumping the parameters sent via Axios will generate the following result:
array:1 [
"category" => "{"value":"category1"}"
]
Note the difference between the two results, where the value of the category in the first result is an array, but its a string in the second !!
How I can fix my Axios request to get the same result as same as the Postman request?