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search:
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# <a id="bitdrift.public.unary.workflows.v1.RuleStartTracing"></a>RuleStartTracing

**Source definition:** [`src/bitdrift/public/unary/workflows/v1/workflow.proto#L457-L463`](<https://github.com/bitdriftlabs/api/blob/main/src/bitdrift/public/unary/workflows/v1/workflow.proto#L457-L463>)

<section class="proto-fields-table" markdown>
| Field | Type | Description |
|---|---|---|
| match_id | <span class="proto-type proto-type-primitive">string</span><br><em class="proto-field-annotation">between 1 and 100 chars</em> | The match ID that when matched will trigger the start of trace sampling. |

</section>
#### Example
```json
{
  "match_id": "_i1yUnHjKfmWpCaD5Tazo"
}
```