file parameter deleted by validation

[moh-yismail]

I am have json response that have field 'file'.
{
"1": {
"action": "music",
"action_data": {
"text": "song1",
"file": "/music/245506953044"
},
"title": "song_1",
}
}

After I apply validation I got:
{
"1": {
"action": "music",
"action_data": {
"text": "song1",
},
"title": "song_1",
}
}
Without 1.action_data.file

any suggestion?