# Parse incoming webhook body
body = parse_json!(.body)

# LinkedIn webhooks contain actor/author URNs like "urn:li:person:abc123"
# We need to extract just the ID to match our OAuth identifier
# Fallback chain: actor -> author -> owner

actorUrn = body.actor ?? body.author ?? body.owner ?? ""

# Extract ID from URN format: "urn:li:person:abc123" -> "abc123"
# Split by colon and take the last segment
if actorUrn != "" {
    parts = split(actorUrn, ":")
    parts[length(parts) - 1]
} else {
    null
}