Signature on Contract

[Rich Johnson]

Hello. If I'm purchasing a home from a seller into a land trust and the land trust has an LLC as the trustee. Exactly how would the contract be signed

For example:

I buy a property that should go into mypropertytrust which has the Trustee listed as ABC LLC. and ABC LLC. is managed by John Smith.

How should the buyer be listed and their signature line?

I appreciate any feedback.  Thanks!