{
  "manageEntity": {
    "action": "Save",
    "entityId": "712258",
    "entityType": "Track",
    "nonce": "0x008a00dec6966fe1fa8d46bdf6dd7c06422efc76913ffdbbafada1741903a124",
    "signature": "0x4c05c14a4304ab62eed4a246a112076474c49826e6cf18d6aab7f78db7ceda87244d0831118d7fb0044dec47ce770a920de9089a50b86f568d9a8865453696b01b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}