{
  "manageEntity": {
    "action": "Save",
    "entityId": "1696475097",
    "entityType": "Track",
    "nonce": "0x02131adee2f7964d88b145dc558f7ff6a4e0f030cd548501fa8c102a49f2eb23",
    "signature": "0x451e8a9f42789bbd810cf09b7c401ee7befcec73cf7b91bbac1904d5b2f5ec7e56c5f2290dfd155c64f653cbcba8f0aa6299f069e47bd30e99f338844b06ea3b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}