Docs needed, predicates in `"/present-proof-2.0/records/<presentationExchangeId>/send-presentation"` examples

[miroslav-inc]

I'm trying to sendPresentation for a request that has predicates, but I can't seem to construct valid sendPresentation request with predicates included. I can see that predicates in SendPresentation request only have

`public static final class IndyRequestedCredsRequestedPred {
    private String credId;
    private Integer timestamp;
}`

But in request I have some condition like age >= 20, I tried adding just same name from request (age for example) and setting credId to credential for which I want to sendPresentation but then I get error from Ursa

Error: Invalid structure. Caused by: UrsaCryptoError: Predicate is not satisfied. CommonInvalidStructure.