> ## Documentation Index
> Fetch the complete documentation index at: https://docs.blnkfinance.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Update metadata
> Update metadata on a resource with the Go SDK.
export const CtaCallout = props => {
const {title, buttonLabel, href, trackingEvent, buttonTarget, rel = "noopener noreferrer", children} = props;
const handleCtaClick = () => {
if (typeof window === "undefined" || !trackingEvent) {
return;
}
try {
window.dispatchEvent(new CustomEvent("blnk:docs-cta", {
detail: {
name: trackingEvent,
href
}
}));
} catch {}
try {
window.posthog?.capture?.(trackingEvent, {
href
});
} catch {}
const gaPayload = {
cta_href: href
};
try {
window.gtag?.("event", trackingEvent, gaPayload);
} catch {}
try {
window.dataLayer = window.dataLayer || [];
window.dataLayer.push({
event: trackingEvent,
...gaPayload
});
} catch {}
};
const isExternal = typeof href === "string" && (/^https?:\/\//i).test(href);
const target = buttonTarget ?? (isExternal ? "_blank" : undefined);
const linkRel = isExternal ? rel : undefined;
return ;
};
Use `client.Metadata.UpdateMetadata` to add or change [metadata](/metadata/overview) on an existing ledger, transaction, balance, or identity.
```go client.Metadata.UpdateMetadata theme={"system"}
result, resp, err := client.Metadata.UpdateMetadata(
"ldg_073f7ffe-9dfd-42ce",
blnkgo.UpdateMetaDataRequest{
MetaData: map[string]interface{}{
"project_owner": "Acme LLC",
"update_status": "Approved",
},
},
)
```
| Field | Type | Description |
| :--------- | :----------------------- | :------------------------------------------------------------------ |
| `entityID` | `string` | ID of the entity to update (`ldg_…`, `txn_…`, `bln_…`, or `idt_…`). |
| `MetaData` | `map[string]interface{}` | Key-value pairs to add or update on the entity. |
Read `result.MetaData` for the full metadata object after the update. New keys are merged with existing metadata.
```json 201 Created wrap theme={"system"}
{
"meta_data": {
"project_owner": "Acme LLC",
"update_status": "Approved"
}
}
```
| Field | Type | Description |
| :---------- | :------- | :----------------------------------------- |
| `meta_data` | `object` | The full metadata object after the update. |
***
## Related docs
Attaching custom attributes to Blnk objects.
HTTP request and response schema.
***
## Need help?
We are very happy to help you make the most of Blnk, regardless of whether it is your first time or you are switching from another tool.
To ask questions or discuss issues, please [contact us](mailto:support@blnkfinance.com) or [join our Discord community](https://discord.gg/7WNv94zPpx).
Sign up and manage your ledger with our back-office dashboard. You can invite teammates to collaborate and manage your ledger operations directly from the dashboard.