{
  "manageEntity": {
    "action": "Save",
    "entityId": "1141499542",
    "entityType": "Track",
    "nonce": "0x19cca4f7a3f5babd89cd736c5eb9538533204a745201ffa40a4261c2dc097462",
    "signature": "0xfc18efb8576f73e19814afed7aa78b3a8a8871f6ddc5a7cd1a0ba6cbb896272d762e05efd81e25f2c2207da9ab9cddf30b899533bca4a82633ba4fa97a96bd581c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}