Cannot append more than 1 value

[maryigoshyna]

Hello again!
When I execute POST request I want to append values to persist.entity json file. I can append one field during request, but Unfortunately I cannot append more. Tell me please is it possible to do or how should I do in such situation?
Next example which works (append 1 field):
"persist": {
"entity": "/adverts/live-1.json",
"actions": {
"append":
"{"data": {\r\n"comments_allowed_for": {{ request.body.data%5Bcomments_allowed_for%5D.(?P\d+) }} }}"
}
}
Next example which doesn't work (append 2 field):
"persist": {
"entity": "/adverts/{{ request.query.storageId }}-{{ storage.GetValue(advert-{{ request.query.storageId }}-{{ request.query.id }}) }}.json",
"actions": {
"append":
"{"data": {\r\n"comments_allowed_for": {{ request.body.data%5Bcomments_allowed_for%5D.(?P\d+) }},\r\n"price-user": {{ request.body.data%5Bprice%5D.(?P\d+) }}\r\n}}"
}
}