@type t() :: %DocuSign.Model.UserSignatures{
  adoptedDateTime: String.t() | nil,
  createdDateTime: String.t() | nil,
  customField: String.t() | nil,
  dateStampProperties: DocuSign.Model.DateStampProperties.t() | nil,
  disallowUserResizeStamp: String.t() | nil,
  errorDetails: DocuSign.Model.ErrorDetails.t() | nil,
  externalID: String.t() | nil,
  imageBase64: String.t() | nil,
  imageType: String.t() | nil,
  initials150ImageId: String.t() | nil,
  initialsImageUri: String.t() | nil,
  isDefault: String.t() | nil,
  lastModifiedDateTime: String.t() | nil,
  nrdsId: String.t() | nil,
  nrdsLastName: String.t() | nil,
  nrdsStatus: String.t() | nil,
  phoneticName: String.t() | nil,
  signature150ImageId: String.t() | nil,
  signatureFont: String.t() | nil,
  signatureId: String.t() | nil,
  signatureImageUri: String.t() | nil,
  signatureInitials: String.t() | nil,
  signatureName: String.t() | nil,
  signatureRights: String.t() | nil,
  signatureType: String.t() | nil,
  stampFormat: String.t() | nil,
  stampImageUri: String.t() | nil,
  stampSizeMM: String.t() | nil,
  stampType: String.t() | nil,
  status: String.t() | nil
}