{
  "manageEntity": {
    "action": "Save",
    "entityId": "2103014695",
    "entityType": "Track",
    "nonce": "0x67b7d6c26cd337106aaeae0a73669dc10161f817f4ab36da46b5b150a8d6adea",
    "signature": "0x23f913a749df09d386eec97ad93aa82f878d5fa9a1b7ab1d7f5733e52dee55ae4c79ba18e3401f5d1cc7c7505d7a5486b5a05526fd6b3d941aa92e049a5826741c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}