{
  "manageEntity": {
    "action": "Save",
    "entityId": "386336",
    "entityType": "Track",
    "nonce": "0x6e3e262f8eea2c6500ba96ee25e229671263298eeb8b0ffd741d216fe21f4c7c",
    "signature": "0xe88a38b51b7929bfeb92ee0eed84d5912ce90a2dbf920623b875a2ae62ef057f4b2184f57ac662745baa272d89d04f607ff95b486a15a4fbf840cabd6f3f35cb1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}