{
  "manageEntity": {
    "action": "Save",
    "entityId": "1755149352",
    "entityType": "Track",
    "nonce": "0x3d472280fc9266290dbc9d07363d2e4ed6d6b2c65601f4f9f8517ac0d08d4e65",
    "signature": "0xa4d1f1fb1b6576fb185e315039a1ff24018f9f55f8399e4f9a04a19d4cb405e93ba42d0a31cc6b70616439843e467a1d42a8811de5e00f0ebbf35eed52a7cba81b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}