{
  "manageEntity": {
    "action": "Save",
    "entityId": "1203033459",
    "entityType": "Track",
    "nonce": "1781019424491838466",
    "signature": "0xda17c689e77722aeb0b0594c571d8e077eca414d027428dbac1aedc7eee546ca619a3c2abddb7048bae83b06b0066c6940aa36ff77fa1a176949d42d12183a4f1b",
    "signer": "0x2cc593FC814461263d282A84286Fd4F72c79562e",
    "userId": "175201368"
  }
}