{
  "manageEntity": {
    "action": "Save",
    "entityId": "1768703118",
    "entityType": "Track",
    "nonce": "0x866d94070506a098b428a3849b4a9525abda8dceda46d06be655b0130faaa2eb",
    "signature": "0x6c77e0fe4f1670600eee7b38198beff7c0eb5d305430c256083eab0b4736aede3db837c4c5af313d7fed4300ddadf36a565b72db4d216f61782ccb57a01a675d1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}