public String executeLoanTransaction(@PathParam("loanId") final Long loanId, @QueryParam("command") final String commandParam,
final String apiRequestBodyAsJson) {
final CommandWrapperBuilder builder = new CommandWrapperBuilder().withJson(apiRequestBodyAsJson);
CommandProcessingResult result = null;
if (is(commandParam, "repayment")) {
final CommandWrapper commandRequest = builder.loanRepaymentTransaction(loanId).build();
result = this.commandsSourceWritePlatformService.logCommandSource(commandRequest);
} else if (is(commandParam, "waiveinterest")) {
final CommandWrapper commandRequest = builder.waiveInterestPortionTransaction(loanId).build();