Doubt: Management diferents ecommerces with one unique account.

Doubt: Management diferents ecommerces with one unique account.

HI! 

I am starting to organize my CRM project and I have a big doubt.

I have several ecommerce sites. Each one of them is completely different from each other. I could open an account for each site but I don´t want this.

I wanted to have a single account and since I managed all the clients of diferent ecommerce.

How can I do? 

I do not mind having a premium account if this fixes my problem.

I hope you can help me.

Best regeards, Joseph