{
  "manageEntity": {
    "action": "Save",
    "entityId": "295552428",
    "entityType": "Track",
    "nonce": "0x9e5a4fbe76cb825802fa45072de5c8b9093104a97ec3af6b98b1edcad9e5db8d",
    "signature": "0xb7ee55f2eaf82efd681fe31cfb99ec0bc2241adcc80e79c6bd42860f95fd75771116c3ae24cac85522ff2934462fc69c9a6f6ccf5da6b744a7928d6c49d370e31b",
    "signer": "0x24844077bE6bb825c0548F36B4EFA030d05Ee1CD",
    "userId": "601282125"
  }
}