{
  "manageEntity": {
    "action": "Save",
    "entityId": "480431673",
    "entityType": "Track",
    "nonce": "0x254067f93d63d699c2fa204d6765e379937058beb20fbdb54ffe493d7d63c5c5",
    "signature": "0xcec812667b2290d94be7bd82dc350c887249715a55c788b3b663e007a96686316b6d11b6941d08c7e0c07832ffbe258604cc12657124b4d2edce4eb2532600cc1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}