Function safe_app::ffi::mutable_data::entry_actions::mdata_entry_actions_update

#[no_mangle]
pub unsafe extern "C" fn mdata_entry_actions_update(
    app: *const App, 
    actions_h: MDataEntryActionsHandle, 
    key: *const u8, 
    key_len: usize, 
    value: *const u8, 
    value_len: usize, 
    entry_version: u64, 
    user_data: *mut c_void, 
    o_cb: extern "C" fn(user_data: *mut c_void, result: *const FfiResult)
)

Add action to update existing entry.

Callback parameters: user data, error code