{
  "manageEntity": {
    "action": "Save",
    "entityId": "1917611770",
    "entityType": "Track",
    "nonce": "1792384404285378514",
    "signature": "0x71cac4e9a04f8c42c84a20f8473173dfc55196a39cdf05f7519b5583737cbdc779a24c9e68f009432b7e04934ae6b041618cdc8ad180e73bf11966e2c1139a8f1b",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}