{
  "manageEntity": {
    "action": "Save",
    "entityId": "1592375771",
    "entityType": "Track",
    "nonce": "0xb34f1b195b90d38b16c83d8540dbbbce36fe9ed9a1a52c1d8dd19a51edd318a1",
    "signature": "0x01569c0607a1c72bb63ee23e7827efdce9cb67c27456f508d9f15e7a35bcf2c1007626aa110884ebe831626508b850a8a08a27b20487b90e927073c66c3dd6eb1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}