{
  "manageEntity": {
    "action": "Save",
    "entityId": "31625606",
    "entityType": "Track",
    "nonce": "0x797b874d11bf208801a9409cf71a6f0d8cac329e316315d988aa4d4ab5eaca6a",
    "signature": "0x2297431b24512c796294c5c2ce1d92e2385aae714638f1caffc0c2ecdbe05cf74e4e4ff7b20be220e2d8230be0659ce8f5d5213ed9367b3be8d2cd4b822861df1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}