diff --git a/docs/learn/dapp-developer/set-nft-metadata.md b/docs/learn/dapp-developer/set-nft-metadata.md
index 798d94719c..ebcaffc6cc 100644
--- a/docs/learn/dapp-developer/set-nft-metadata.md
+++ b/docs/learn/dapp-developer/set-nft-metadata.md
@@ -114,6 +114,8 @@ Here we will use the following parameters as examples:
 - `dataKey`: [`LSP4Metadata`](../../standards/tokens/LSP4-Digital-Asset-Metadata.md#lsp4metadata)
 - `metadataValue`: some placeholder value as a [`VerifiableURI`](https://github.com/lukso-network/LIPs/blob/main/LSPs/LSP-2-ERC725YJSONSchema.md#verifiableuri).
 
+> Note that the `tokenId` is a `bytes32` value (hex)
+
 :::info
 
 You can use the `encodeData` function from the [_erc725.js_](../../tools/erc725js/classes/ERC725.md#encodedata) library to encode a `VerifiableURI` easily.