subnet.json

{
  "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
  "contentVersion": "2017.09.01.0",
  "parameters": {
    "Name": {
      "type": "string",
      "metadata": {
        "description": "The name of the resource that is unique within a resource group. This name can be used to access the resource."
      }
    },
    "AddressPrefix": {
      "type": "string",
      "metadata": {
        "description": "The address prefix for the subnet."
      }
    },
    "NetworkSecurityGroupId": {
      "type": "string",
      "defaultValue": "",
      "metadata": {
        "description": "The reference of the NetworkSecurityGroup resource."
      }
    },
    "RouteTableId": {
      "type": "string",
      "defaultValue": "",
      "metadata": {
        "description": "The reference of the RouteTable resource."
      }
    },
    "ServiceEndpointId": {
      "type": "array",
      "defaultValue": [ ],
      "metadata": {
        "description": "An array of service endpoints."
      }
    }
  },
  "variables": {
    "comment": {
      "documentation": "https://docs.microsoft.com/en-us/rest/api/virtualnetwork/VirtualNetworks/CreateOrUpdate#definitions_subnet"
    },
    "NsgId": "[if(empty(parameters('NetworkSecurityGroupId')),json('null'),json(concat('{\"id\":','\"',parameters('NetworkSecurityGroupId'),'\"}')))]",
    "RouteId": "[if(empty(parameters('RouteTableId')),json('null'),json(concat('{\"id\":','\"',parameters('RouteTableId'),'\"}')))]",
    "SvcEndpointArray": "[if(empty(parameters('ServiceEndpointId')),json('null'),parameters('ServiceEndpointId'))]",
    "subnet": {
      "name": "[parameters('Name')]",
      "properties": {
        "addressPrefix": "[parameters('AddressPrefix')]",
        "networkSecurityGroup": "[variables('NsgId')]",
        "routeTable": "[variables('RouteId')]",
        "serviceEndpoints": "[variables('SvcEndpointArray')]"
      }
    }
  },
  "resources": [
  ],
  "outputs": {
    "subnet": {
      "type": "object",
      "value": "[variables('subnet')]"
    }
  }
}