{
  "manageEntity": {
    "action": "Save",
    "entityId": "578337292",
    "entityType": "Track",
    "nonce": "0x40ee5b35fad114fe556ac35d401ab9fd36f39b9637b7361393513065934f644b",
    "signature": "0x121efc9ebc59a9881c6525b5db54aca049a3ff4ed97aac387422dc6b647f5b7f15a3258e27e22a1a0716362656ec2461e421b81803ab2028919a3da61a5d6e1b1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}