{
  "type": "string",
  "enum": [
    "UNKNOWN_EXTERNAL_WORKFLOW_EXECUTION",
    "SIGNAL_EXTERNAL_WORKFLOW_EXECUTION_RATE_EXCEEDED",
    "OPERATION_NOT_PERMITTED"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "SignalExternalWorkflowExecutionFailedCause"
}