有人可以告诉我我的package.json文件出了什么问题吗？

我有npm，并且有一个json验证程序站点告诉我我的package.jason文件无效。我看过论坛和堆栈溢出，似乎没有什么可以解决。这是代码：

{
"name": "linobs",
"version": "1.0.0",
"description": "A linux streaming software",
"main": "main.js",
"scripts": {
"test": "linobstest",
"start": "electron ."
},
"keywords": {
"obs",
"broadcast",
"open source",
"Free",
"Streaming"
},
"author": "Dustin Hacker",
"license": "ISC"
}

来自网站的错误消息：

{
  "valid": false,
  "critical": "Invalid JSON - SyntaxError: JSON.parse: expected ':' after property name in object at line 11 column 6 of the JSON data"
}

来自npm的错误消息：

npm ERR! code EJSONPARSE
npm ERR! file /home/ldhacker/Documents/Electron Project/package.json
npm ERR! JSON.parse Failed to parse json
npm ERR! JSON.parse Unexpected token , in JSON at position 183 while parsing near '...
npm ERR! JSON.parse "keywords": {
npm ERR! JSON.parse "OBS",
npm ERR! JSON.parse "Broadcast",
npm ERR! JSON.parse "Open...'
npm ERR! JSON.parse Failed to parse package.json data.
npm ERR! JSON.parse package.json must be actual JSON, not just JavaScript.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/ldhacker/.npm/_logs/2020-09-13T18_38_47_283Z-debug.log

先感谢您！

编辑：

删除,之后"main": "main.js",，现在我得到：

npm ERR! code EJSONPARSE
npm ERR! file /home/ldhacker/Documents/Electron Project/package.json
npm ERR! JSON.parse Failed to parse json
npm ERR! JSON.parse Unexpected string in JSON at position 103 while parsing '{
npm ERR! JSON.parse "name": "linobs",
npm ERR! JSON.parse "version": "1.0.0",
npm ERR! JSON.parse '
npm ERR! JSON.parse Failed to parse package.json data.
npm ERR! JSON.parse package.json must be actual JSON, not just JavaScript.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/ldhacker/.npm/_logs/2020-09-13T19_13_16_582Z-debug.log