关注：

{"signature":"ed246490c6727b9ea4bbf4ea0dd949709f2526fb","openid":"obi123-us","nonce":"906353609","timestamp":"1594610774"}

取关：

{"signature":"5f2a731a6538bc1a875a60cbc0d62cc9a9a3a33f","openid":"obi123-us","nonce":"2079325648","timestamp":"1594610792"}

发送消息：

{"signature":"3f9cbaff117046c9bfbf8590239fc4e9a39f4acc","openid":"obi123-us","nonce":"33583785","timestamp":"1594610802"}