{
  "manageEntity": {
    "action": "Save",
    "entityId": "416115703",
    "entityType": "Track",
    "nonce": "0x3f872d1a5214aefb41966ea73ad5d6418e9b199fcfb3b457822d01e4818097d5",
    "signature": "0x05c045fabc6aef4ac8bfacd49b777c24bd77b03909489f653ec41bf162f7d71558b99712142105dd2b4425262a3f1eb3cbbf590f65d8c37b29b8fa3c882328271b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}