{
  "manageEntity": {
    "action": "Save",
    "entityId": "1100950871",
    "entityType": "Track",
    "nonce": "1790345870902649190",
    "signature": "0xa1f0dad28645c551d84a0675685d19615f29c42ca25ddfc87a0816fe8c3ae5da53d7ac8155a74629cf1f51878e2e562c9a9c71aa83ae159e26c34e39e8bb0bcc1c",
    "signer": "0x512F9723ECbDB6Dc537A671b3D2fb35CC68017a4",
    "userId": "105562689"
  }
}