Cannot parse the JSON sent from cURL

[cxxboy]

Hello! I'm writing a an http server in which Im using this JSON lib for parsing the "application/json" data. Here is my cURL command to send a request to me server.

$ curl -v -H "Content-Type: application/json" -d '{"value_one":123, "value_two":"foo_value"}' http://localhost:8766/poster

And here is the function where I'm parsing the JSON

std::string call_back(const std::string& user_agent_request_body){
	try{
		using json = nlohmann::json;
		auto parsed_json = json::parse(user_agent_request_body.c_str());
		int int_value = parsed_json["value_one"];
		std::string string_value = parsed_json["value_two"];
		std::string returner = "value_one: " + std::to_string(int_value) + " value_two: " + string_value;
		return returner;
	}catch(const std::exception& e){
		std::cout << e.what() << std::endl;
		std::string returner_exception = "Invalid POST data to JSON endpoint";
		return returner_exception;
	}
}

For context, user_agent_request_body is the Request Body from a Client(which is the JSON {"value_one":123, "value_two":"foo_value"} as std::string) But, this gives me an exception.

[json.exception.parse_error.101] parse error at line 1, column 43: syntax error while parsing value - invalid literal; last read: '"foo_value"}�'; expected end of input

I don't know if Im doing something wrong, Can someone please help me with this issue?

[nlohmann]

Can you make sure the string is properly terminated? The exception states that at byte 43 there is some garbage.