{
  "manageEntity": {
    "action": "Save",
    "entityId": "1651500640",
    "entityType": "Track",
    "nonce": "0x0939eb55e82bbd8d8bebca2bb056509500564238fb5c630c1e0c4907a389fd43",
    "signature": "0x9030c6f0a0038cc0d22fd3c10c765ed966fbb04e9bc8df93f0f8507f490ea8854de5fabde6f4a901f4da35b9daae4e5097bf67e4251f54454c054a6b66aea0781c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}