{
  "manageEntity": {
    "action": "Save",
    "entityId": "741986848",
    "entityType": "Track",
    "nonce": "0xec798afffd6536d3e6a71bd7e45b048a2dc828432c0986d58dda7987334f2f72",
    "signature": "0xb41f064d12c2a16c79f6edac1c70c290bcfad743dd1121242a63f279b485250f651d17c267444133c2c60af8704b2a2dfcf6a3ab6585ca1b99177eb66c96c79d1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}