{
  "manageEntity": {
    "action": "Save",
    "entityId": "407439942",
    "entityType": "Track",
    "nonce": "0x107ca6f42030f81baac83b9eb95d45b6c0572b9dd8f7e76c67e1a6045927a67a",
    "signature": "0x5dc4dbc389df57807bd3979b9f5f3e90894f4393e87c71658687fadb76fb884c4ac011237d0269f40150240f5718827efc9c7f33bebe98792a8f531694ea801c1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}