{
  "manageEntity": {
    "action": "Save",
    "entityId": "1029793",
    "entityType": "Track",
    "nonce": "0xc5121c3501f3ba27ad28b2aed7a46982c56ff70749376416ee03f55d5a915cc0",
    "signature": "0xdf0f9290d780afe7ba83db9672e8c899eb04babca2d14338fbb53d34e527962508c41666f0d154b37f5130aee86adf5a97f63df8fd92c446d8fe3b766dadde041b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}