{
  "manageEntity": {
    "action": "Save",
    "entityId": "622320",
    "entityType": "Track",
    "nonce": "0x53f3616af37660a71f5d124801392789233afb4ede32e9d08b6a1034d56dcfc6",
    "signature": "0xeafe13b648e63df30531dd3734f7fa238dd1176844e8d970cf515f4ff99c6f0f369637e299af56d19b67bd211d2f627b2d019cdceeef35b8efdfc250dd4f359a1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}