{
  "manageEntity": {
    "action": "Save",
    "entityId": "1372694487",
    "entityType": "Track",
    "nonce": "0x67c9ec72ad1478426fe36f876b89678df70d4a4615f6bcfe26a10cbcb8c889f4",
    "signature": "0x12302d7c24ada61c4f3f1d6798e6c8e633311a5be063e30e7318d32306ecf8b05d0ddee800cca8ceb459319e9a47a9fd24253c9d93f6cb77198c8a33307c202a1b",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}