{
  "manageEntity": {
    "action": "Save",
    "entityId": "1588406828",
    "entityType": "Track",
    "nonce": "0x489258df1abe430e11009485d29c6ed379015d3d77ada2f6ea2f7acd6535ad07",
    "signature": "0xfacaedf975596d2fef5dd971d8d2b1802664151188a73086d6c4145b131dad1444159128da001ad830822ade79fcce8c83bae0edaf79bb8dbcfc40063e5a48481b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}