JSON Encoding. https://swiftyfinch.github.io/en/2020-05-19-json-encoding/

WithoutEscapingSlashesEncoder.swift

struct WithoutEscapingSlashesEncoder {

    private enum EncoderError: InternalError {
        case dataToUTF8
        case utf8ToData
    }

    func encode<T: Encodable>(_ object: T) throws -> Data {
        let jsonEncoder = JSONEncoder()
        if #available(iOS 13, *) {
            jsonEncoder.outputFormatting = .withoutEscapingSlashes
            return try jsonEncoder.encode(object)
        } else {
            let data = try jsonEncoder.encode(object)
            guard let string = String(data: data, encoding: .utf8)
            else { throw EncoderError.dataToUTF8 }

            let fixedString = string.replacingOccurrences(of: "\\/", with: "/")
            guard let fixedData = fixedString.data(using: .utf8)
            else { throw EncoderError.utf8ToData }
            return fixedData
        }
    }
}