{
  "manageEntity": {
    "action": "Save",
    "entityId": "1066683326",
    "entityType": "Track",
    "nonce": "0x43311bf62435f122e9f6f8d7f672da2950d546f01b8e34aa3bcdc89f26384b6e",
    "signature": "0x3a5363aef72bddc815c4564f947d71a73e2d3e8475c8ac53295708649e4094530e04fa71c6c13dcfc362d28d6530ec335d9cdacee6a680d5b2439c73036e266d1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}