{
  "manageEntity": {
    "action": "Save",
    "entityId": "2078733123",
    "entityType": "Track",
    "nonce": "0x8bcb75d59c9ebd1b838d9868ebd78050e29aee6b2454c83dd02a86f7e60c965e",
    "signature": "0x548dbb204cafc7edc78ea4c145d977c4a3f1744a30902968e30bbc78b05b91f307c2516ffabdbb22c641e2e67b75edeffcf86b778c6ebb85978685957d8b8ed01b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}