ContractServiceManager csm1 = new ContractServiceManager(getConnection(), RSCM_MID);
ContractService cs = new ContractService();
cs.setId(-1);
cs.setContractId(contract.getId());
cs.setServiceId(1);
cs.setAmount(123);
cs.setDate(Calendar.getInstance());
csm1.updateContractService(cs);

bitel.billing.server.rscm.bean.*

ContractServiceManager csm1 = new ContractServiceManager(getConnection(), 6);
ContractService cs = csm1.getContractServiceList(cm.getContractByTitle(client_id).getId(),Calendar.getInstance()).get(0);

cs.setId(-1);
cs.setContractId(contr.getId());
cs.setServiceId(1);
cs.setAmount(123);
cs.setDate(Calendar.getInstance());
csm1.updateContractService(cs);