Upsert customer organisation metadata by key

Sets the value for a metadata key on a customer organisation, creating the entry if it does not already exist. Intended for external systems that track their own key but do not know the corresponding internal metadata ID.

curl -X PUT "http://m-api-dev.phas.io/api/manufacturer/v1/organisation/1/metadata/key/shopifyCustomerId" \  -H "Content-Type: application/json" \  -d '{    "value": "string"  }'

{
  "id": "497f6eca-6276-4993-bfeb-53cbbbba6f08",
  "metadataKey": "string",
  "value": "string"
}