(Nullable*) The block number that this token was created in.
block_hash
(Nullable*) The hash of the block.
source
System that provided the token metadata attribution.
preference
Source priority score used for deduplication when multiple sources provide metadata.
_created_at
Timestamp of entry creation.
_updated_at
Timestamp of entry update.
* These fields are null for tokens that are indexed by our self-healing / patching pipelines in the event that our initial decoding attempt is unsuccessful.
