{
  "manageEntity": {
    "action": "Save",
    "entityId": "1834455804",
    "entityType": "Track",
    "nonce": "0x67f2ad1ac48b61deae0b6caa5915fff31a2506d073243f29197104c5cb39bd74",
    "signature": "0x2cce68b69a7f248a8adf7adc18255b06eba5cc9ff878f92b1dee80c463297a3015cd1df7091df55caceba7c937f1cf0c7e101e0efe9bc5eb91ab7307491bd4001c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}