{
  "manageEntity": {
    "action": "Save",
    "entityId": "1808918145",
    "entityType": "Track",
    "nonce": "0xeb38c9e499f107b5dfaf8030ddefaac6395da5c3c33016e6d7a1cd10861dc88b",
    "signature": "0xfa5c61fb8ba8ffca6d5a8a0f5b18df31b404c4be4850a5666acbf7f710474e0b5c4337ab61d2f4043f7f31757c220fe64d6245296807101794370f1522128c301c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}