How to find UUIDs?
Since API v2 we've switched to UUIDs istead of IDs.
To manually add a coin and pull its data, you simply need to get a coin's UUID from Coinranking.
UUIDs of coins can be found using the Get coins endpoint or by checking the URL on coinranking.com: https://coinranking.com/coin/Qwsogvtv82FCd+bitcoin-btc is the URL for Bitcoin, and the part before the + (Qwsogvtv82FCd) is the UUID.
Or use the search endpoint: https://developers.coinranking.com/api/documentation/search.