myconfig.json

{
   "ietf-interfaces:interface": {
      "name": "Loopback3",
      "description": "MadeBy Robert!",
      "type": "iana-if-type:softwareLoopback",
      "enabled": true,
      "ietf-ip:ipv4": {
           "address": [
               {
                "ip": "3.3.3.3",
                "netmask": "255.255.255.255"
               }
           ]
      }
   },
   "ietf-interfaces:interface": {
    "name": "Loopback4",
    "description": "MadeBy Robert!",
    "type": "iana-if-type:softwareLoopback",
    "enabled": true,
    "ietf-ip:ipv4": {
         "address": [
             {
              "ip": "4.4.4.4",
              "netmask": "255.255.255.255"
             }
         ]
    }
 },
 "ietf-interfaces:interface": {
    "name": "Loopback5",
    "description": "MadeBy Robert!",
    "type": "iana-if-type:softwareLoopback",
    "enabled": true,
    "ietf-ip:ipv4": {
         "address": [
             {
              "ip": "5.5.5.5",
              "netmask": "255.255.255.255"
             }
         ]
    }
 }
}