curl --request PUT \
  --url https://api-staging.pixwel.com/api/assettypes/{id} \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "1x1-assets",
  "category": "av",
  "group": "digital",
  "created": "<string>",
  "$links": {
    "self": "//api-staging.pixwel.com/api/Assettypes/1x1-assets"
  }
}
'

{
  "name": "1x1-assets",
  "category": "av",
  "group": "digital",
  "created": "<string>",
  "$links": {
    "self": "//api-staging.pixwel.com/api/Assettypes/1x1-assets"
  }
}