from fulcrum import Fulcrum
fulcrum = Fulcrum('{token}')

obj = {
  "layer": {
    "name": "USGS Topo",
    "description": "USGS Topo Base Map - Primary Tile Cache",
    "type": "xyz",
    "source": "http://basemap.nationalmap.gov/arcgis/rest/services/USGSTopo/MapServer/tile/{z}/{y}/{x}"
  }
}

layer = fulcrum.layers.update('{id}', obj)
print(layer['layer']['id'] + ' has been updated!')

const { Client } = require('fulcrum-app');
const client = new Client('{token}');

const obj = {
  "name": "USGS Topo",
  "description": "USGS Topo Base Map - Primary Tile Cache",
  "type": "xyz",
  "source": "http://basemap.nationalmap.gov/arcgis/rest/services/USGSTopo/MapServer/tile/{z}/{y}/{x}"
};

client.layers.update('{id}', obj)
  .then((layer) => {
    console.log(layer.id + ' has been updated!');
  })
  .catch((error) => {
    console.log(error.message);
  });

# Not currently supported