description: |- 
  A simple form response example.
value:
  _type: Form
  _embedded:
    payload:
      _meta:
        notificationMessage:
          format: markdown
          raw: '*Hallo*'
          html: '<p class="op-uc-p"><em>Hallo</em></p>'
      _links:
        project:
          href: '/api/v3/projects/21'
          title: Death Star v3
        principal:
          href: '/api/v3/users/14'
          title: Mara Jade
        roles: [ ]
    schema:
      _type: Schema
      _hint: Schema resource shortened for brevity
    validationErrors:
      roles:
        _type: Error
        errorIdentifier: urn:openproject-org:api:v3:errors:PropertyConstraintViolation
        message: Roles need to be assigned.
        _embedded: 
          details: 
            attribute: roles
  _links:
    self: 
      href: '/api/v3/memberships/form'
      method: post
    validate: 
      href: '/api/v3/memberships/form'
      method: post
