Create a Custom or a Content activity for a member

{
  "type": "object",
  "properties": {
    "member_slug": {
      "type": "string"
    },
    "workspace_slug": {
      "type": "string"
    }
  },
  "required": [
    "member_slug",
    "workspace_slug"
  ],
  "additionalProperties": false
}