Pushover Sound notification

I am trying to include a sound in a Pushover notification but no success with the following:

service: notify.pushover
data:
  message: test test
  data:
   sound: pianobar

On my Iphone Pushover App has sound activated and also in Iphone settings Pushover sound is allowed.
Anyone any idea what may be wrong ?

First data/title doesn’t quite look right?? From a script I use that works. Here is the API.

service: notify.pushover
data:
  title: "{{ title }}"
  message: "{{ pushover_message }}"
  data:
    target: "{{ target }}"
    sound: "{{ sound }}"
    html: "{{ html }}"
    priority: "{{ priority }}"

I have Pushover installed. When I run this

service: notify.pushover
data:
  message: another test

the message gets to my Pushover App on my Iphone.
It is only the sound that I don’t get to work. Let me try to work with your example.

No success. I have tried everything.
When I change the default sound in the Pushover App on my Iphone, I can hear that sound. I just don’t get the sound when sending a message from HA (but do get the text).

Have you tried sending a picture to see if that reaches the phone?

service: notify.pushover
data:
  title: "{{ title }}"
  message: "{{ pushover_message }}"
  data:
    target: "{{ pushover_target }}"
    sound: "{{ sound }}"
    html: "{{ html }}"
    priority: "{{ priority }}"
    attachment: "{{ message_link }}"