Receive a Mattermost message when a user updates their profile on Facebook

{
  "id": "131",
  "name": "Receive a Mattermost message when a user updates their profile on Facebook",
  "nodes": [
    {
      "name": "Facebook Trigger",
      "type": "n8n-nodes-base.facebookTrigger",
      "position": [
        590,
        260
      ],
      "webhookId": "14ba2eea-04a1-4659-b83e-0090ba480452",
      "parameters": {
        "appId": "",
        "options": {
          "includeValues": true
        }
      },
      "credentials": {
        "facebookGraphAppApi": "facebook"
      },
      "typeVersion": 1
    },
    {
      "name": "Mattermost",
      "type": "n8n-nodes-base.mattermost",
      "position": [
        790,
        260
      ],
      "parameters": {
        "message": "=The user with uid {{$node[\"Facebook Trigger\"].json[\"uid\"]}} changed their {{$node[\"Facebook Trigger\"].json[\"changes\"][0][\"field\"]}} to {{$node[\"Facebook Trigger\"].json[\"changes\"][0][\"value\"][\"page\"]}}.",
        "channelId": "13fx8838gtbj3d41a6a7c1w7fe",
        "attach...