{
  "manageEntity": {
    "action": "Save",
    "entityId": "1821409100",
    "entityType": "Track",
    "nonce": "0x6bccf6f4e58f986e58a7bb88dbcd32dbf79737d00d1b354472eb8ee4af109539",
    "signature": "0xd936fda853383acb95771a38ed23eb2f4d75583d95b3645bebfb7c24edcade0f0889c423bda458ef7357cf406c1ef19eeea54b9249ffa0d71fb75cc3d31c665f1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}