{
  "manageEntity": {
    "action": "Save",
    "entityId": "1200010804",
    "entityType": "Track",
    "nonce": "0xef70203fb930ddf40880647973837e4bafb2b18fd3f479ca02105f263689227e",
    "signature": "0x5d5fe365b14c77d2fd619566c6749283877cf70ea7801fcb5ec1ac8c876d214518b6cd1cc17aa75da7fa359dd1746e973481c9bd744f5d7b0b9dafcec2437aa31c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}