{
  "manageEntity": {
    "action": "Save",
    "entityId": "1247822444",
    "entityType": "Track",
    "nonce": "0xfdbc0a436591dd9748a8f73386c6334b28322706a3247e5edb79be1e750511d0",
    "signature": "0x028698a34adb00a415ad68c498731937ad16185f4b3c4ab4af9a24273ec7fa4734fb793188d07ce7e55fee8d77edf784a28b9a5431b57b440a17343fa1b5143a1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}