{
  "manageEntity": {
    "action": "Save",
    "entityId": "1210653730",
    "entityType": "Track",
    "nonce": "0x41c8f762285e8e44122cbbb95657c8f39663c3ee0aae0f292a4116e266db00bb",
    "signature": "0x762acf2c0e493725da30a73d6874664d61df84b38718bc8b224ab03fd1c3e9550d9266e421541b1daad9b5fac62b467a80aea60f4ea40b70048d9eacf8770c731c",
    "signer": "0xf954E35976C0aAaEC2968197F2a371Cc99E7C81A",
    "userId": "102143"
  }
}