{
  "manageEntity": {
    "action": "Save",
    "entityId": "1126635",
    "entityType": "Track",
    "nonce": "0x874dd3ed431ad144ba107f0ff6dee4beea59be3e9ab5fcba92dfa686dfddac10",
    "signature": "0x864a41308aab40f7e44d3161b57d1a12924f90fb20a50a7ca92785808cc1990029ac203a6742d7bc1cdf79c708888b806c95ef1cb2372681c60bf314663ca14a1c",
    "signer": "0x9FF2A7F5Fab732dA57359bb3eD63a95511bD1329",
    "userId": "67863854"
  }
}