{
  "manageEntity": {
    "action": "Save",
    "entityId": "393996",
    "entityType": "Track",
    "nonce": "0xa852bea46ebcc20b5cafde2bf6a975c84eb933bd3fa5cd5949effc2d098d3189",
    "signature": "0xed047e0e84b6c85576af3b13491033da9632e27a883d054b5e8b2e867d03342f3a8010d44b6adcf4e6b7f87fa252cbd18d175952ae2afff221f682c8af4a81b51c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}