{
  "manageEntity": {
    "action": "Save",
    "entityId": "1434914483",
    "entityType": "Track",
    "nonce": "0x3853675ceb172d0d9573370858cbcedafcfda890f21a12869b870fa01cc5b8d0",
    "signature": "0x6303681ca49350b1495ec5de5395dc0320ad7ffe7a91b87fab3b16a9f0f3879d70f785b4eae8fba0aba86116495f81cdda37c9d1d3a889cd1c0303236be8430b1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}