{
  "manageEntity": {
    "action": "Save",
    "entityId": "415818",
    "entityType": "Track",
    "nonce": "0xaae35341a2452a6aa05656bdba3be566bb5b943b7206ea2491c76873bb613c98",
    "signature": "0xd060f7ec2de0af53ea2d35a6ba602ff0f41c84395efeb75d37ffb0aa131670901deaa2be0adc99d38beed0a66f6804b78a50cd79d9328b18ba644f84d77932ea1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}