{
  "manageEntity": {
    "action": "Save",
    "entityId": "245064871",
    "entityType": "Track",
    "nonce": "0xcdff85083f9ff802df91813006de3be4ce6eee191849997df7adc8bafdf8cc14",
    "signature": "0x4741d46439b20c3ca09039dd2f86d80528e5671668281ea6ad0d095dfcc1813a517e7e2348ee2d17af43280823ca35df9cccdd8951717feb7e60c46021ed2abb1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}