{
  "manageEntity": {
    "action": "Save",
    "entityId": "1680025727",
    "entityType": "Track",
    "nonce": "1786793078129082298",
    "signature": "0xa50f88f98706d894a7406369191524e8fc807fc9abf2af73b80d8f16f4a0fc9c3751bc8950b8402050b050edf92355ea6c668b85ce793d849e275fbbe1ac20601c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}