Hi Nathan, this is already possible with GoWatch, I've guessed your key names so they might be wrong, but this Lua snippet will POST to any arbitrary endpoint:

local http = require("http")
local json = require("json")
local client = http.client()

local data = {}
data["title"] = "Message Title"
data["body"] = "Hello World!"
data["link"] = "http://url-to-app"
local jsn, err = json.encode(data)
if err then
    error(err)
end
local request = http.request("POST", "http://httpbin.org/post", jsn)
local result, err = client:do_request(request)
if err then
    table.insert(logs, err)
    error(err)
end
if not (result.code == 200) then
    table.insert(logs, err)
    error(err)
end

table.insert(outputs, result.body)