{
  "manageEntity": {
    "action": "Save",
    "entityId": "3383480",
    "entityType": "Track",
    "nonce": "0x8b63c92574391c22d927cbc1e48f18d2f59614780b7be919e1aa78543a6d15bf",
    "signature": "0xfde5406178fb80f620a4acc7f79fdf6453b71c18163a2eafa92a8ca84a0f064d70af5c8d90b4150310aa35fe8eb97418f0ff3648c1239483d35bb4d0b44638301b",
    "signer": "0x06Ad5789cE045C5B0AeB97849051a7385CA95B4a",
    "userId": "270209897"
  }
}