Failed to parse json from request: key must be a string at line 1 column 2

[pratham15541]

I am getting error when I am running post command for:
curl --request POST --header "X-Access-Token: my-token" --header "Content-type: application/json" --data "{"image": "glot/python:latest", "payload": {"language": "python", "files": [{"name": "main.py", "content": "print(42)"}]}}" http://localhost:8088/run

{ "error": "request.parse", "message": "Failed to parse json from request: key must be a string at line 1 column 2" }