{
"manageEntity": {
"action": "Save",
"entityId": "205258918",
"entityType": "Track",
"nonce": "0x2fe7fee26b0635b8e36dd5bfeabe622747ce061ac013ae59dfdfe41e5e995a51",
"signature": "0xc095a911506c67dc05dea50e0d143652c02b6fed5fffeaa42d9d71cd8266ba3049bb3538079e5c6ffafaf41c58737a928daa5b9dea729f9d3133f23fe9562ce61c",
"signer": "0x0E71C12c426F5C9206F778713f48B60477CA943b",
"userId": "29088079"
}
}