Use wscat with HTTP JSON API Streaming API?

Questions
2

This works:

wscat --connect http://localhost:7575/v1/stream/query \
      --subprotocol 'daml.ws.auth' \
      --subprotocol 'jwt.token.eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJodHRwczovL2RhbWwuY29tL2p3dC9hdWQvcGFydGljaXBhbnQvc2FuZGJveCIsInN1YiI6ImFsaWNlIiwiaXNzIjoiaWdub3JlZCJ9.uKjafJLbf4KCgBL6ys1pBT2jxs0DpflUpKX-5ZRtLVs' \
      --execute '{ "templateIds" : [ "bc6d87a0d45cb8e2a9ea194ab9d380e79ab9622695c8fa9ab6c23d764d1e0df5:Main:Asset" ] }'
Results 
{
  "events": [
    {
      "created": {
        "agreementText": "",
        "contractId": "003b0bf878e6602afdeae71c1f8abb032d27ed83b0a6e8e6b59aa351cd705ed82dca03122087e0aa95e3e93725fe43fe942d4c5c5ace112c6bcfd95b90581f1004bd47fab2",
        "observers": [],
        "payload": {
          "issuer": "Alice::1220f3de2718124a544a3d46f3ef32fb51ffc963ba761bbadaed8b4667d482436fbd",
          "owner": "Alice::1220f3de2718124a544a3d46f3ef32fb51ffc963ba761bbadaed8b4667d482436fbd",
          "name": "TV"
        },
        "signatories": [
          "Alice::1220f3de2718124a544a3d46f3ef32fb51ffc963ba761bbadaed8b4667d482436fbd"
        ],
        "templateId": "bc6d87a0d45cb8e2a9ea194ab9d380e79ab9622695c8fa9ab6c23d764d1e0df5:Main:Asset"
      },
      "matchedQueries": [
        0
      ]
    }
  ]
}
{
  "events": [],
  "offset": "000000000000000009"
}

Alternatively, connect and then submit the filter:

wscat --connect http://localhost:7575/v1/stream/query \
      --subprotocol 'daml.ws.auth' \
      --subprotocol 'jwt.token.eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJodHRwczovL2RhbWwuY29tL2p3dC9hdWQvcGFydGljaXBhbnQvc2FuZGJveCIsInN1YiI6ImFsaWNlIiwiaXNzIjoiaWdub3JlZCJ9.uKjafJLbf4KCgBL6ys1pBT2jxs0DpflUpKX-5ZRtLVs'

{ "templateIds" : [ "bc6d87a0d45cb8e2a9ea194ab9d380e79ab9622695c8fa9ab6c23d764d1e0df5:Main:Asset" ] }
Results 
< {"events":[{"created":{"agreementText":"","contractId":"003b0bf878e6602afdeae71c1f8abb032d27ed83b0a6e8e6b59aa351cd705ed82dca03122087e0aa95e3e93725fe43fe942d4c5c5ace112c6bcfd95b90581f1004bd47fab2","observers":[],"payload":{"issuer":"Alice::1220f3de2718124a544a3d46f3ef32fb51ffc963ba761bbadaed8b4667d482436fbd","owner":"Alice::1220f3de2718124a544a3d46f3ef32fb51ffc963ba761bbadaed8b4667d482436fbd","name":"TV"},"signatories":["Alice::1220f3de2718124a544a3d46f3ef32fb51ffc963ba761bbadaed8b4667d482436fbd"],"templateId":"bc6d87a0d45cb8e2a9ea194ab9d380e79ab9622695c8fa9ab6c23d764d1e0df5:Main:Asset"},"matchedQueries":[0]}]}
< {"events":[],"offset":"000000000000000009"}
< {"events":[],"offset":"000000000000000009"}
            :
            :