{
  "manageEntity": {
    "action": "Save",
    "entityId": "1594941580",
    "entityType": "Track",
    "nonce": "0xdf7c6bd5395151d2fd38996cbf5ed8a9a45f5251b451693cbf352b1a9e96541d",
    "signature": "0x742666902475d985c8d56720ef36a660f0b1d533d79225fb3f44eeddb2f8002f5badd51dec8ac72d4340f857ea8ee19b83a5ab62a18359ffe80598bd9347aedc1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}