{
  "manageEntity": {
    "action": "Save",
    "entityId": "1177404315",
    "entityType": "Track",
    "nonce": "0x45401937312f6d4a9004355420ff6f8d7df0c02068309444f2c83b0353422ee3",
    "signature": "0x34f58e6d6d676b037a496b9193f67d1c0c9dd80fd9ac0cef05f73359270bfcf050368c2648febfe41ebda2a656faab0122d620c8719491b04037151a9f535d671b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}