{
  "manageEntity": {
    "action": "Save",
    "entityId": "1762656336",
    "entityType": "Track",
    "nonce": "1787425654920655940",
    "signature": "0x4395af58e6f63295b662e079758859d5f8919587c6638cf2bdf3b3503cac8c847d25b3285e2b5e7a7ba959312ebf8a2360378f5f7ab31d7a82ec806d9225b5ec1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}