Unspent vestings for a native asset
Content-Type: application/json. Body may be empty or {}.
policyId + . + hex-encoded asset name (same as elsewhere: Asset ID). The dot may appear inside the hex name segment; the server parses a full AssetClass string.vestings array of objects (id, lockUntil, redeemerVkh, tokenPolicyId, tokenAssetName, totalLocked, vestingOwnerAddress, spent).