wxpay.sign params: appid=wx180c707faf22b9e6&mch_id=1489790842&nonce_str=c6d4c9c8238f4812a2a14fc48108fa30&receiver={'type':'MERCHANT_ID','account':1489935602,'relation_type:'DISDISTRIBUTOR'}&signType=HMAC-SHA256&sub_mch_id=1489933702

==========wxpay.sign sign: 66811618EA0A9E28E40CF6E59A17D3CF

***********ps_addrecevier: {"return_code"=>"FAIL", "return_msg"=>"分账接收方格式错误"}

=> [false, " - 分账接收方格式错误 - "]