{
"manageEntity": {
"action": "Save",
"entityId": "1516732226",
"entityType": "Track",
"nonce": "0xc2049faa50125e7da1ec063f314938ff2fd912817db2ff94dee6822ca7449670",
"signature": "0x7e054a49b146e51964d30bdb18f87741e894c09d159606c602839f03e5e9354a226078b6c5384704b81391ae2dbf590fde51fc342d7ffd939634d7146a9db7331c",
"signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
"userId": "580720856"
}
}