{
  "manageEntity": {
    "action": "Save",
    "entityId": "1019533890",
    "entityType": "Track",
    "nonce": "0x845d3c2522e02e9d4f4571a899b8c0fdb99a21e92989ffff615d8bf4048d1f98",
    "signature": "0xceda0b03e6bc1d603c95f82ff1658604e6d9cae3a6c20462bddacd2c3d1df77758103a4b35387d08037363104bac7d987fbcd2f481638a357dfc8ac24a4b39011b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}