{
  "manageEntity": {
    "action": "Save",
    "entityId": "919451",
    "entityType": "Track",
    "nonce": "0x9f492aa7a414b9f01a8c1b36a1813f3fc00dedd6e145f0682033c8a2a75f888e",
    "signature": "0xca5e3e48ae30d55919ddce9f3a760ddd24e7d3bde8d01b4802a96263d787554e0227246585e255c1ba8dab2488b5d86bd60c61c0831086b2a6132ba453b5f7671c",
    "signer": "0x9FF2A7F5Fab732dA57359bb3eD63a95511bD1329",
    "userId": "67863854"
  }
}