In AWS, 10MB payload limit applies to the message body. If you're running into limits on the header size, unfortunately these cannot be configured. They are stated on the CloudFront page: http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/cloudfront-limits.html
like mentioned be Ankita in the comment the error is showing that the file has not a correct JSON structure.
You can try using JSONLint to validate your JSON structure online: https://jsonlint.com/