Currently for a smart contract that has an Option parameter, is not intuitive how to add None.
Example:

 #[ink(storage)]
    pub struct TestContract {
        name: String,
        otherContract: Option<H160>,
    }

    impl TestContract {
        #[ink(constructor)]
        pub fn new(name: String,  otherContract: Option<H160>) -> Self {
            Self { name, otherContract }
        }

The None value has to be indicated with "" e.g: pop up --args \"name\" "" . This is because cargo-contract library is implemented that way, to improve the DevEx why not let the user use None and convert it under the hood to "".

Also the experience to input a String has to be improved too, to don't use \"name\": #408