Update a custom activity for a member

{
  "type": "object",
  "properties": {
    "activity_type": {
      "type": "string",
      "description": "The type of activity - what action was done by the member. This is a legacy field, use activity_type_key instead."
    },
    "activity_type_key": {
      "type": "string",
      "description": "The key for a custom activity type for the workspace. Will create a new activity type if it does not exist."
    },
    "description": {
      "type": "string",
      "description": "A description of the activity; displayed in the timeline"
    },
    "id": {
      "type": "string"
    },
    "key": {
      "type": "string",
      "description": "Supply a key that must be unique or leave blank to have one generated."
    },
    "link": {
      "type": "string",
      "description": "A URL for the activity; displayed in the timeline"
    },
    "link_text": {
      "type": "string",
      "description": "The text for the timeline link"
    },
    "member_slug": {
      "type": "string"
    },
    "occurred_at": {
      "type": "string",
      "description": "The date and time the activity occurred; defaults to now"
    },
    "properties": {
      "type": "object",
      "description": "Key-value pairs to provide contextual metadata about an activity."
    },
    "title": {
      "type": "string",
      "description": "A title for the activity; displayed in the timeline"
    },
    "weight": {
      "type": "string",
      "description": "A custom weight to be used in filters and reports; defaults to 1."
    },
    "workspace_slug": {
      "type": "string"
    }
  },
  "required": [
    "id",
    "member_slug",
    "title",
    "workspace_slug"
  ],
  "additionalProperties": false
}