{
  "manageEntity": {
    "action": "Save",
    "entityId": "1973214096",
    "entityType": "Track",
    "nonce": "0x676ecc8806117ecbff2495a6e248263bc2611024ac3c48007039595993389200",
    "signature": "0xb48e339aab91b3bf9cc90394477da55e38953f26fde760bf5a83a76db35b8a7f4ee7764f5037a7bdc86e2558389bd9597a10659328d098c98c36b27fa144088b1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}