{
  "manageEntity": {
    "action": "Save",
    "entityId": "105939",
    "entityType": "Track",
    "nonce": "0x03405a734e19f537d2d0931ec6653644f190e0604cfa5cc9404bb24ff8e6028e",
    "signature": "0xa0033cde2b04475bd5a4aac02c9f579bd1f3e02ab3513415045ee6e11bdb6cbe3785b158f03a2329c25d22d4abc098d46f1c5ac6911b48470160ffbafccae49f1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}