/**
   * Updates a signer's information from a package
   *
   * @param packageId The id of the package containing the signer to be updated
   * @param signer The signer with the updated information
   */
  public void updateSigner(PackageId packageId, com.silanis.esl.sdk.Signer signer) {
    Role apiPayload =
        new SignerConverter(signer).toAPIRole(UUID.randomUUID().toString().replace("-", ""));

    String path =
        template
            .urlFor(UrlTemplate.SIGNER_PATH)
            .replace("{packageId}", packageId.getId())
            .replace("{roleId}", signer.getId())
            .build();

    try {
      String json = Serialization.toJson(apiPayload);
      client.put(path, json);
    } catch (RequestException e) {
      throw new EslException("Could not update signer.", e);
    } catch (Exception e) {
      throw new EslException("Could not update signer." + " Exception: " + e.getMessage());
    }
  }
  /**
   * Adds a signer to the specified package
   *
   * @param packageId The id of the package in which the signer will be added
   * @param signer The signer to be added
   * @return The role id of the signer
   */
  public String addSigner(PackageId packageId, com.silanis.esl.sdk.Signer signer) {
    Role apiPayload =
        new SignerConverter(signer).toAPIRole(UUID.randomUUID().toString().replace("-", ""));

    String path =
        template
            .urlFor(UrlTemplate.ADD_SIGNER_PATH)
            .replace("{packageId}", packageId.getId())
            .build();

    try {
      String json = Serialization.toJson(apiPayload);
      String response = client.post(path, json);
      Role apiRole = Serialization.fromJson(response, Role.class);
      return apiRole.getId();

    } catch (RequestException e) {
      throw new EslServerException("Could not add signer.", e);
    } catch (Exception e) {
      throw new EslException("Could not add signer." + " Exception: " + e.getMessage());
    }
  }
 /**
  * Send SMS to the signer.
  *
  * @param packageId The id of the package to start FastTrack
  * @param signer The signers to get the signing url
  * @return The signing url
  */
 public void sendSmsToSigner(PackageId packageId, com.silanis.esl.sdk.Signer signer) {
   Role role =
       new SignerConverter(signer).toAPIRole(UUID.randomUUID().toString().replace("-", ""));
   sendSmsToSigner(packageId, role);
 }