{
  "manageEntity": {
    "action": "Save",
    "entityId": "479792011",
    "entityType": "Track",
    "nonce": "0xf6ca5019fdbfba7641d8fae00ff4cea271771fdfcb358d1a87a3909961c0c3b4",
    "signature": "0x0988f467ed0fa8aca9f8319418aa79e5e97e8c08a4024581a2dc368835df36fd2e5d3070b0f8d2776f9e5d14866c519cd7d6958377a29cafc591e96a0210d7631c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}