{
  "manageEntity": {
    "action": "Save",
    "entityId": "1646980832",
    "entityType": "Track",
    "nonce": "0xfef8a72d3dda20c80a1c37621aecfe904f186e70c03a10e81433dce1df00129c",
    "signature": "0x0963f1190ea719d7b7048a0bac853c08be4f93bf8597acea7408cdda8f40d4b049cc148c1df5b987307327730240956a5affc9bff7724b546b214a0a42750a421c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}