What field store default signature

Hi,

In database, there is table names user_signatures

I have API to get default signature from email setting but I cannot find what field in Sugar store default signature.

This is my email setting, in Signatures: I selected admin signature to default.

My query to get default signature it not 100% correct because no condition for default signature.

SELECT signature_html FROM users_signatures
WHERE user_id = '{$id}' and deleted = 0

Sugar Pro 7.7.1.0

Thanks,

M