Get Care Conversation by Source Id

Hi

I'm trying to use this API Get conversation details by document source ID (khoros.com) which should get the Care conversation details based on the community id.

https://instance.response.lithium.com/api/v2/conversations/bySourceDocumentId/networks/{network}/instances/{instance}/id/{source document id}

Has anyone used this before? Looking for what to use for {network} and {instance}

I have tried several things unsuccessfully. I think network is "lithium" and I think I know the name of my instance but have tried multiple combinations without any luck.

Thanks