{
  "manageEntity": {
    "action": "Save",
    "entityId": "1012116",
    "entityType": "Track",
    "nonce": "0xf16089d672be17b418d9ad304d22deacd3281db0294a7c17ef90e2e4adf2f2cd",
    "signature": "0x298bcb587cd97f8ebbe33380bb4d3e5a0827105e4ac3ccffbec52c1725535a0e14be5bb518e7fc4e48f0adc132706dbc89ec375142335fca61dc490838a4e4f01c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}