old_contents: {
    "policy": [
      
  
      {
        "remove": [
          
  
          {
            "inbound": [
              {
                "cookie": 3,
                "match": { "eth_src": "08:00:27:89:3b:9f" },
                "action": { "drop": 0 }
              }
            ]
          }
  
  
        ]
      },
      
  
      {
        "insert": [
          
  
          {
            "inbound": [
              {
                "cookie": 3,
                "match": {
                  "eth_src": "08:00:27:89:3b:99"
                },
                "action": {
                  "drop": 0
                }
              }
            ]
          }
  
  
        ]
      }
  
  
    ]
  }
new_contents: {
    "policy": [
      
      {
        "remove": [
          
          {
            "inbound": [
              {
                "cookie": 3,
                "match": {
                  "eth_src": "08:00:27:89:3b:9f"
                },
                "action": {
                  "drop": 0
                }
              }
            ]
          }
  
  
        ]
      },
      
      {
        "insert": [
          
          {
            "inbound": [
              
              {
                "cookie": 3,
                "match": {
                  "eth_src": "08:00:27:89:3b:99"
                },
                "action": {
                  "drop": 0
                }
              }
            ]
          }
  
  
        ]
      }
    
  
    ]
  }
subject: update blackholing config file