{
  "manageEntity": {
    "action": "Save",
    "entityId": "1089379997",
    "entityType": "Track",
    "nonce": "0x3ceb6c681c945e1de1d5fe055d0d5b96585aba763f593835af4bd41b1f7d8242",
    "signature": "0xf1c535fe3ea3a8aaafec28dc8f975064f0c038f0203ec322ff4b2a30db4ce09551d3213b7ff8f44553e98e7903a91916497c8aa2467516c6aa9460fc3479eb231b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}