app-api/app/qiyuesuo/sdk/bean/SignParam.php

<?php
class SignParam implements JsonSerializable
{

    private $contractId; // 合同Id
    private $bizId; // 业务Id
    private $tenantName;//子公司名称
    private $sealId; // 指定签署位置印章Id
    private $stampers; // 签署位置

    public function jsonSerialize()
    {
        $data = [];
        foreach ($this as $key => $val) {
            if ($val !== null) $data[$key] = $val;
        }
        if (sizeof($data) < 1) {
            return null;
        }
        return $data;
    }

    /**
     * @return mixed
     */
    public function getContractId()
    {
        return $this->contractId;
    }

    /**
     * @param mixed $contractId
     */
    public function setContractId($contractId)
    {
        $this->contractId = $contractId;
    }

    /**
     * @return mixed
     */
    public function getBizId()
    {
        return $this->bizId;
    }

    /**
     * @param mixed $bizId
     */
    public function setBizId($bizId)
    {
        $this->bizId = $bizId;
    }

    /**
     * @return mixed
     */
    public function getTenantName()
    {
        return $this->tenantName;
    }

    /**
     * @param mixed $tenantName
     */
    public function setTenantName($tenantName)
    {
        $this->tenantName = $tenantName;
    }

    /**
     * @return mixed
     */
    public function getSealId()
    {
        return $this->sealId;
    }

    /**
     * @param mixed $sealId
     */
    public function setSealId($sealId)
    {
        $this->sealId = $sealId;
    }

    /**
     * @return mixed
     */
    public function getStampers()
    {
        return $this->stampers;
    }

    /**
     * @param mixed $stampers
     */
    public function setStampers($stampers)
    {
        $this->stampers = $stampers;
    }
}