How to change the ownerid on an account

Hi,

I am able to create a new account using the web API /api/data/v9.2/accounts. But when I do this. It allocates the account to the API account. How would I then change the _ownerid to the correct user after creation, if the _ownerid is a read-only property?

The goal is to export all accounts from another system to Dynamics  using the web API and then allocate these accounts to the correct users that also exist on the old system