{
  "manageEntity": {
    "action": "Save",
    "entityId": "511927131",
    "entityType": "Track",
    "nonce": "0xdffd08f85886708f828e312d90c319e4682ac831fde1b51a53001c8c097ab7b4",
    "signature": "0xd40578533a67add399d0d846b22e9a1b2f1733c29f351be6409f25207cc84a894f174e35cdaac46346cd7a3d7a99a06399090418c762c74d3d2763aa121635201b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}