Github API error “Problems parsing JSON” when using curl but works fine with Postman

I am trying to create a release using Github’s API.

My request works fine in Postman but no matter what I’ve tried it always fails with curl, including if I just translate my Postman request into curl using Postman.

This is the body of my Postman POST request:

{
    "tag_name": "4.2.0",
    "target_commitish": "master",
    "name": "4.2.0",
    "body": "test"
}

I’ve included an authorization header of type “Basic”, where I input my username and a token I have created for this purpose.

I am executing the request against https://api.github.com/repos///releases.

As I said – it works fine, but when I translate it into curl I get the error “Problems parsing JSON”.

The translated curl command is:

curl --location --request POST 'https://api.github.com/repos///releases' 
--header 'Authorization: Basic ' 
--header 'Content-Type: application/json' 
--data-raw '{
    "tag_name": "4.2.0",
    "target_commitish": "master",
    "name": "4.2.0",
    "body": "test"
}'

which I reformat into curl --location --request POST 'https://api.github.com/repos///releases' --header 'Authorization: Basic ' --header 'Content-Type: application/json' --data-raw '{ "tag_name": "4.2.0", "target_commitish": "master", "name": "4.2.0", "body": "test"}' to be on one line.

I also tried (since only the “tag_name” parameter is required):

curl -i -H 'Authorization: token ' -d '{"tag_name":"4.2.0"}' https://api.github.com/repos///releases

curl -i -H 'Authorization: token ' -d '{"tag_name":"4.2.0"}' https://api.github.com/repos///releases --header Content-Type:application/json

curl -d '{"tag_name":"4.2.0"}' -u : https://api.github.com/repos///releases --header "Content-Type:application/json"

curl -d "tag_name=4.2.0" -u : https://api.github.com/repos///releases --header "Content-Type:application/json"

Every curl request fails with the “Problems parsing JSON” error.

Why would it work fine in Postman but not in curl?