AI-generated Key Takeaways
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          A single operation can create or remove an asset group signal. 
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          Policy violation keys can be optionally listed to prevent PolicyViolationErrors for certain violations, though not all are exemptable. 
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          Resources saved despite policy violations will not serve initially but may become eligible later. 
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          The operationfield specifies the mutate operation, which can be eithercreateorremove.
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          For a create operation, no resource name is needed, while a remove operation requires a specific resource name format. 
A single operation (create, remove) on an asset group signal.
| Fields | |
|---|---|
| 
 | Optional. The list of policy violation keys that should not cause a PolicyViolationError to be reported. Not all policy violations are exemptable, refer to the is_exemptible field in the returned PolicyViolationError. Resources violating these polices will be saved, but will not be eligible to serve. They may begin serving at a later time due to a change in policies, re-review of the resource, or a change in advertiser certificates. | 
| Union field 
 | |
| 
 | Create operation: No resource name is expected for the new asset group signal. | 
| 
 | 
 Remove operation: A resource name for the removed asset group signal is expected, in this format:  |