{
"trust": {
"expires_at": "2014-12-30T23:59:59.999999Z",
"impersonation": false,
"project_id": "'$PROJECT_ID'",
"roles": [
"name": "admin"
}
],
"trustee_user_id": "'$DEMO_USER_ID'",
"trustor_user_id": "'$ADMIN_USER_ID'"