{
  "manageEntity": {
    "action": "Save",
    "entityId": "610928171",
    "entityType": "Track",
    "nonce": "0xd7c370d03d6946c9dcf58c270aa492e234ce92a1ac7709b87fb173cb704c82ee",
    "signature": "0xe3a3fa40cd82d0b8f8020bc94f8fe8a2662625a23ce094cc72ead1433a98ef5a3b8d326034d90d6548b8fdcd76458949ccbc5eb9800e82c852dca7a6f1acb4b01b",
    "signer": "0x65E206f484415ee5E20E9B8da531F689983C6e36",
    "userId": "718637748"
  }
}