{
  "manageEntity": {
    "action": "Save",
    "entityId": "1106395129",
    "entityType": "Track",
    "nonce": "0x4c437efdcae11d3be3ca8f69c42f6d44148ef2fb1e06a8005de048588509d077",
    "signature": "0x0b78a9b614423490b3775e1cdc383767163eaf69650b1d655d4e4b397bfc90bc2d7c4bd82b1cef8e04565268e27c14514f25f0d387f51696a0aedc94f86375331c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}