{
  "manageEntity": {
    "action": "Save",
    "entityId": "1352506965",
    "entityType": "Track",
    "nonce": "0x22f79c28274a97d57606967cc5eb704dab66281fcb432299dc308c5e9092ef9a",
    "signature": "0x5e34502b027965c8bba1bf1cc458bbae8462a43cc00924655136728c3ed801a62ba40ac86c3833efcd518cb542a470f4e0556d96ea35ade9fd50885a4c9861161b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}