{
  "manageEntity": {
    "action": "Save",
    "entityId": "1605090106",
    "entityType": "Track",
    "nonce": "0x589de080ea4d4f06c93d9dee91efff6ff7813768b0fbd93c4be1e4e00c297d19",
    "signature": "0x1b5738ab580bb2301f0762a8bdfe59748dd0776d5cd1fbded15a67988071363d14571dd5cd85580e875a3a16c032746dd267a85cd1df4a2a94e4871360e4f59e1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}