{
  "manageEntity": {
    "action": "Save",
    "entityId": "631399",
    "entityType": "Track",
    "nonce": "0x934579c9d830df6df963ca34a816768f3df341ed6c02d02a4b6fffd9ad7bffc0",
    "signature": "0x44aba860d8bf48727cc436c4e6db885e2de241c3c117571991d57755271d97d13c427595baee200b47016cc6b60da3d078c10dc4bba6a194d3b53b98a0c14e181b",
    "signer": "0x0946c54D7Bd95A069DD100F93Ec74b01b6023523",
    "userId": "230796408"
  }
}