HTTP POST request API

I am trying to send a POST request to Notion with json body. The request contains a header with three fields.

I get an response HTTP/1.1 400 Bad Request. What am I doing wrong? Everything works through Postman. I also tried to shape the request body as a matlab structure.

My code:

data = '{"parent":{"database_id":"<my_id>"},"properties":{"title":{"title":[{"text":{"content":"hello"}}]}}}';
uri=matlab.net.URI('https://api.notion.com/v1/pages');

method = matlab.net.http.RequestMethod.POST;
header = matlab.net.http.HeaderField('Authorization', 'Bearer <secret_token>',...
                                     'Content-Type',  'application/json',...
                                     'Notion-Version','2021-05-13');
body = matlab.net.http.MessageBody(data);

request = matlab.net.http.RequestMessage(method,header,body);
[response,completedrequest,history] = send(request,uri)

[Reeshabh Ranjan]

@Orkhan Alikhanov could you update the question with the solution containing MATLAB structure as the request body?

[Orkhan Alikhanov]

I was able to compose a request using the function urlread2.

Header = http_createHeader({'Authorization', 'Content-Type','Notion-Version'} ,{['token'], 'application/json','2021-05-13'});

url = 'https://api.notion.com/v1/pages';

data = strcat('{my json request}');

response=urlread2(url,'POST', data ,Header);

Thanks!

[Reeshabh Ranjan]

@Orkhan Alikhanov its working now, right?

[Orkhan Alikhanov]

@Reeshabh Ranjan Yes. Thank you!