can a landlord or manager force you to sign something that doesn’t explain anything?

we live in a mobile home park and the owner is forcing us to pay and forcing us to sign a paper from the “state” but the contract or form he wants us to sign doesn’t say anything, he comes and threatens us with eviction and with taking us to court we have lived here for over 15 years never had a problem until now he is trying to charge us 500 dollars for a light pole that they just installed, but they are already charging us for electricity and they have not connected the pole yet, everyone else has signed but my parents and another tenant, the management threatened others with eviction and other treats . its been about 2 months with they have been haggling us, wouldn’t they have done something already if they really wanted too kick us out? what can i do? please help