{
  "manageEntity": {
    "action": "Save",
    "entityId": "1235350441",
    "entityType": "Track",
    "nonce": "0x49ab11030e2a819dcbb597741477e5fbfe7bcbce2a5087e2b2cb61a5208c564d",
    "signature": "0x355485a34bdcc6b17a34e35a5a4f767ea00dde6ceff9d377925abfc0b4717aac4a0785bdaa38bc60d016185f245bc7b27c7fbbd4fc17f450f7cf58eded2438f41b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}