{
  "manageEntity": {
    "action": "Save",
    "entityId": "88015",
    "entityType": "Track",
    "nonce": "0x1adec123e928ae66a178d2b19c401f700811ba3e51289aa4d4c8dad2d064be82",
    "signature": "0xcf577d967316dce3580be3fe37dd39c9b42cd55921631e25efad1a7e892878d460b4436dcfad536ba7d35e30bb6b487d99c25153483161bcb6c6577b646ce0891c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}