{
"Content": "string",
"ToWxid": [
"string"
],
"Wxid": "string"
}curl --location 'http://test-cn.your-api-server.com/Msg/SendGroupMassMsgText' \
--header 'Content-Type: application/json' \
--data '{
"Content": "string",
"ToWxid": [
"string"
],
"Wxid": "string"
}'{}