Change_multiple_column_values returning http 500

My query is returning error even with parsing the column_values and body data. Is there something that I’m missing?

{"query":"\\n    mutation ($id: Int!, $boardId: Int!, $columnValues: JSON!) {\\n      change_multiple_column_values(\\n        item_id: $id,\\n        board_id: $boardId,\\n        column_values: $columnValues\\n        ) {\\n          id\\n        }\\n    }","variables":"{\\"id\\":10,\\"boardId\\":12345678,\\"columnValues\\":{\\"texto\\":\\"false\\",\\"text4\\":\\" \\"}}"}

{ error_message: 'Internal server error', status_code: 500 }