{
  "manageEntity": {
    "action": "Save",
    "entityId": "1832152332",
    "entityType": "Track",
    "nonce": "0xda50ecf8bb35ae9505eba8b54e782d8ebd80c707e3254c15978af9a4f32ac4fb",
    "signature": "0x92db61e866871777698468c50bdb274844f0149249c0e99a530c7acc2d4ffe82071e21a53b20bc69c324ae99bb0c11413a41582f333537e8aa781f6996d4ae5f1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}