{
  "manageEntity": {
    "action": "Save",
    "entityId": "739113946",
    "entityType": "Track",
    "nonce": "0xc215405c41901c78bdaed29ef94dcdb6a4db4d9585c62b1d21fdacc05f9aca7e",
    "signature": "0x3ee3c2358469b9140a9f1b318975bf9bbca3fb224ae967013b628979eaa49a2c098d7dbaeab85b3550acb6f394d04ea6259840a230776bf45dbe6b137adf83f71b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}