How to correctly send SetParameterValues request

Upon receiving the VALUE CHANGE event, I need to check for vendor specific value and if the value is 1, I have to send inform respnose and setParamterequest.
I am trying like this but it does not seem to be sufficient.
const {
fault: fault,
rpcId: id,
rpc: acsRequest,
} = await session.rpcRequest(sessionContext, null);

How do I correctly frame the SetParameterValues request? I am new to GenieACS and any help is appreciated.

You need to give a lot more context. Are you using an extension script to send data to an external system? How are you wanting to do the SPV? API or provision script?
Maybe it helps you.