{
  "manageEntity": {
    "action": "Save",
    "entityId": "215764599",
    "entityType": "Track",
    "nonce": "0xfd813bca6ad5686d37a221caaaa0678603482e472fd9bbdf9364e6633c9e16cf",
    "signature": "0xcf12be23a829686b9dbc645c203e6daf94baefa8e7e4075e86586267b577400d717aa4e9cfd1090fd6c485c7ac513acf709d9c79f25fadcc27c01a80572c70491b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}