curl --request POST \
--url https://api.example.com/sessions/by-slug/:slug/viewers \
--header 'Content-Type: application/json' \
--data '
{
"viewers": [
{
"id": "<string>",
"lastSeenAt": "<string>",
"requests": 123,
"ip": "<string>"
}
],
"viewerId": "<string>"
}
'