{
  "manageEntity": {
    "action": "Save",
    "entityId": "1740579198",
    "entityType": "Track",
    "nonce": "0x2be078197899a6d78aeaf84a82019df705868cdc3a53a9fd3a58a9466e3df62d",
    "signature": "0x476f2d6ee5773c71f1e6b85d2b4010427de08678db89df71dd9c0ab3d53e26524b23626c13ed0a3c5aee816d670ef1ef19219daecbc88f7d84a8603b6e1beabe1b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}