{
  "manageEntity": {
    "action": "Save",
    "entityId": "2019492765",
    "entityType": "Track",
    "nonce": "0x05f5b0d1aadf28b04325588bf1595bad100ba469caca74ac8f54f59fd437f942",
    "signature": "0x313a3c6ad102f588f6b78a4e4e0798a2709887e8d41e5e4c3b1063e3b8df2a72719aa7d6dc352dc1d12adb3706f3e8faf18f4d7714d243839992a405d67784a81b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}