Edit Issue - Google Apps Script - Error 400 (No content to map to Object due to end of input)

[Saeed]

I have read numerous posts on this issue and have experimented with suggestions. Unfortunately, none of them has addressed my problem. I can pull ticket information using the same authorization. There is no issue there.

var args = {
  "method":"PUT",
  "headers":{
    "Authorization": "Basic " + Utilities.base64Encode("email:token"),
    "Content-Type":"application/json"
  },
  "body":"{"update":{"summary":[{"set":"Bug in business logic"}]}}"
}

UrlFetchApp.fetch('https://my-domain.atlassian.net/rest/api/3/issue/KEY-123', args)

Exception: Request failed for https://my-domain.atlassian.net returned code 400. Truncated server response: {"errorMessages":["No content to map to Object due to end of input"]}

I am a site admin, and below is the result for my edit permission. What am I missing? Is there a different permission required for editing through the API?

https://my-domain.atlassian.net/rest/api/3/mypermissions?permissions=EDIT_ISSUES

"permissions": {
  "EDIT_ISSUES": {
  "id": "12",
  "key": "EDIT_ISSUES",
  "name": "Edit Issues",
  "type": "PROJECT",
  "description": "Ability to edit issues.",
  "havePermission": true
  }
}

---

I am sure there are posts on this subject that I have missed. A link to similar post would be greatly appreciated.

Thank you.

Test helper:

function editIssue() {
  try {
    const DOMAIN = 'my domain';
    const EMAIL = 'my email address';
    const API_TOKEN = 'my token';
    const ISSUE_KEY = 'my issue key or ID';

    var authorization = `Basic ${Utilities.base64Encode(`${EMAIL}:${API_TOKEN}`)}`;
    
    var bodyData = {
      update:
      {
        summary: [
          {
            set: 'Bug in business logic 2'
          }
        ]
      }
    };

    var fetchArgs = {
      method: 'PUT',
      headers: {
        'Authorization': authorization,
        'Accept': 'application/json',
        'Content-Type': 'application/json'
      },
      body: JSON.stringify(bodyData)
    }

    var url = `https://${DOMAIN}.atlassian.net/rest/api/latest/issue/${ISSUE_KEY}`;
    var resp = UrlFetchApp.fetch(url, fetchArgs);
    var code = resp.getResponseCode();
    Logger.log('Success!');
  }
  catch (e) {
    Logger.log(`Edit issue failed. ${e}`);
  }
}

[Saeed · Accepted solution]

body: in params is incorrect. Switching to payload: fixed the issue.

    var fetchArgs = {
      method: 'PUT',
      headers: {
        'Authorization': authorization,
        'Accept': 'application/json',
        'Content-Type': 'application/json'
      },
      payload: body: JSON.stringify(bodyData)
    }