curl --request POST \
  --url https://api2.rhombussystems.com/api/accesscontrol/lockdownPlan/enableLockdownTestModeForLocation \
  --header 'Content-Type: application/json' \
  --header 'x-auth-apikey: <api-key>' \
  --header 'x-auth-scheme: <x-auth-scheme>' \
  --data '
{
  "locationUuid": "AAAAAAAAAAAAAAAAAAAAAA"
}
'

{
  "state": {
    "activeLockdownPlans": [
      {
        "lockdownPlanUuid": "AAAAAAAAAAAAAAAAAAAAAA",
        "scope": "ORG_LOCKDOWN",
        "scopeUuid": "AAAAAAAAAAAAAAAAAAAAAA"
      }
    ],
    "createdAtMillis": 123,
    "followingTestPlan": true,
    "locationUuid": "AAAAAAAAAAAAAAAAAAAAAA",
    "orgUuid": "AAAAAAAAAAAAAAAAAAAAAA",
    "state": "STANDARD_SECURITY",
    "stateChangedAtMillis": 123,
    "updatedAtMillis": 123
  }
}