ActivityFacilityModel(活动管制员席位)
{
"id": 1,
"activity_id": 1,
"min_rating": -1,
"callsign": "string",
"frequency": "string"
}{
"id": 1,
"activity_id": 1,
"min_rating": -1,
"callsign": "string",
"frequency": "string"
}