{
  "manageEntity": {
    "action": "Save",
    "entityId": "906240803",
    "entityType": "Track",
    "nonce": "0x5c7ca50c947f936d65c4e6c3fda928f1d71a753bfdb111f4e097fa192aae4068",
    "signature": "0xdb3b30339db7ae0b0476126ecf9ffa4ae07903487003abc7af38cace417346af6351336b5b8f34895f529759bc4c2dbfe4e9200bf2fb4f9d446f544db8df7cd61b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}