{
  "manageEntity": {
    "action": "Save",
    "entityId": "712689323",
    "entityType": "Track",
    "nonce": "0x183681b9ffe9ad8b85de764fb9afde25fcdd3262c64ccc1593dae5f60a788b06",
    "signature": "0x7f350cbead7edf4087cf35e6224c88ba7ceeed338da7105100b0b2b1cf142d382aed17ccdf2e6c5a9107e761d88693b7eab56fb91db5eb48c4f4784315b61e721b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}