{
  "manageEntity": {
    "action": "Save",
    "entityId": "79902",
    "entityType": "Track",
    "nonce": "0xd8c378eed9d2007acca4e8f4e1463df95e52ded0b6013635543abc7d7aadef26",
    "signature": "0x54e0a5320c35eeba218bce8e003fb581b496c0a03891c9a73548ccbe7f8fcc7e0ec9d081dc0235d7f971b4cffb01616add2740bf8fb9c97024469e84527db8d61c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}