{
  "manageEntity": {
    "action": "Save",
    "entityId": "1861784985",
    "entityType": "Track",
    "nonce": "1792357549702807099",
    "signature": "0xb78e71275f5a18bd85ea3c254f4f915aac30c0329b9dc8f8f9fba21fe8a654e35b22e18afb0ad5d77fd1d26417e55d2be98882ec1eab22ea3e34076eb4b94dec1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}