{
  "manageEntity": {
    "action": "Save",
    "entityId": "920649",
    "entityType": "Track",
    "nonce": "0x2b56aee63074b1245de8f3b5fa354862d7393f78c56d519a826cfb41a288e5b0",
    "signature": "0xa513baa6fc72ead39124a3f8cdf8552fe312fef701fe04f74ac046f5f58d900b6b43bca925278de397796a810bfebae3456018c6e5c87dd58a33aaf35800eafc1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}