Reading the _push_enabled user setting like this on Android crashes the app (tested with today's latest nexus app):
{
"type": "showMessage",
"leadingDelimiter": "{&",
"trailingDelimiter": "&}",
"dynamicParams": {
"_push_enabled": {
"context": "userSetting",
"field": "_push_enabled"
}
},
"params": {
"text": "{&_push_enabled&}"
}
}