{
  "manageEntity": {
    "action": "Save",
    "entityId": "597244886",
    "entityType": "Track",
    "nonce": "0xdac02c6b8b870f7f56aeede7110a194a95e5195018f687be8b120e1a582b9ad1",
    "signature": "0x90db45ebbfb0d23b90f284af7c6ae490381c58fb2cb02783b9c3c0a0cc3e4898739ba9f9985d7fb81233ec054f9646ba15ae4e0a4cd9fd087f451903d56a893d1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}