curl -X POST http://127.0.0.1:18081/get_outs
     -d '{"outputs" : [{"amount":500000000000, "index":154735}]}'
     -H 'Content-Type: application/json'

{
    "outs": [{
        "height": 141288,
        "key": "29a5f6af06999f1c61c97a415c4ac02a38be8a09be090a76fcf5abc2dad3fc1e",
        "mask": "e9aa7c81cdb5b3148fb7628063cd7a07d1add1643cedd3fa34479d859cc56265",
        "txid": "87dec17ae302c75d202ebcf7bac0d2c295573ec5976b253106fe48ee082c292e",
        "unlocked": true
     }],
     "status": "OK"
}