Exact syntax to add a watcher to an existing Jira ticket with the REST API?

fullNameUsername

Part of my C# program creates a Jira ticket (working) and, depending on the user who is creating the ticket, adds a watcher (not working).

URL that I'm using:  http://jira/rest/api/2/issue/TS-1000/watchers

I've done a lot of reading and the json syntax to add a watcher should be something like "{"username":"jdoe"}" but that synxtax, or any variation thereof (user instead of username, double quotes, single quotes, escaped quotes, etc) doesn't result in success.

The result of this code is

400 Bad Request

and

The request sent by the client was syntactically incorrect.

Can someone please give me a working JSON example to add a watcher that doesn't involve curl?  I'm not using curl and I don't know how to translate a curl command to json.

Thank you!

fullNameUsername

After taking a closer look at https://community.atlassian.com/t5/JIRA-questions/add-watcher-json-syntax-used-for-jira-rest-api-java-jersey/qaq-p/168958 I saw that in OP's original code the JSON was being saved to a variable and then passed to the web request (like I was trying to do). 

But then in the answer OP stated that it wasn't working because the watcher username wasn't being passed with quotes surrounding the username variable.  But that's only half of the solution; I also noticed that the JSON variable wasn't being passed any longer - just the watcher username, surrounded by quotes, was being passed.

So the answer is to forget about the JSON and just pass the username with quotes.