{
  "manageEntity": {
    "action": "Save",
    "entityId": "1539831713",
    "entityType": "Track",
    "nonce": "0xc460fadd5b038cd1bcd28e81fa4b4b120c1dd00effd296c36a09bf45d39b1397",
    "signature": "0x840a069807070cad4282ed9f2f5a4b0e2462ab3aa421e37a9cb11c35c6405cd54cf567b2e413bc4ae6266c399c2ca25bc5418d1d63645e96255221d2bbec5e481b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}