{
  "manageEntity": {
    "action": "Save",
    "entityId": "1092973840",
    "entityType": "Track",
    "nonce": "0x38aed25c7958cc233e7383f30b1e8f56d63258c2b3f4a654fa8a74d78156ac2d",
    "signature": "0x61bc6d4be814f89ab935a4e85110cf51eea9c1d24b51847c44276bd8aca3e11501b0115194e05e41fb7c013beea121380d8d6ba3c088c217f7507dcb4f1c35cb1b",
    "signer": "0x334b140fE9d685A0b45ADF4b1666b979432E75c7",
    "userId": "550101899"
  }
}