Validations:
Must be a Integer
needs to be a JSON-encoded string having the following format:
[ { "content_id": "2", "answer_id": "3" }, { "content_id": "5", "answer_id": "8" }, { "content_id": "9", "answer_id": "12" }, { "content_id": "3", "answer_id": "15" } ]
Must be a String