{
  "manageEntity": {
    "action": "Save",
    "entityId": "1040694355",
    "entityType": "Track",
    "nonce": "0xad746474e33ddd6b6a786c58fc327ae88801e754f5972c38dbb75a41dc746505",
    "signature": "0x3a8591ddc8b977d15fea9e64ade95138652832e38e5839c4e23448b38a21c1c17e6204194a40f429c3c1ed49dbd8a655489896e9be8406e75890501ea2655a0f1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}