Broadcast Message
POST https://{{et_subdomain}}.rest.marketingcloudapis.com/push/v1/messageApp/{{mobilepush_message_id}}/send
Broadcasts a message to all users of a push-enabled app.
Request Body
{"Override"=>true, "MessageText"=>"New information available!", "title"=>"Boost your winnings!", "subtitle"=>"Check your app to see what else is in store.", "mutable-content"=>1, "SendTime"=>"2012-10-31 09:00", "Sound"=>"MyFile.caf", "Badge"=>"+1", "OpenDirect"=>"OD01", "CustomKeys"=>{"keyA"=>"keyA_value", "keyB"=>"keyB_value"}, "CustomPayload"=>{"customA"=>"customA_value"}}