{
  "manageEntity": {
    "action": "Save",
    "entityId": "1707310457",
    "entityType": "Track",
    "nonce": "0xd08162fac5e813e7289f630ec677076beb7a3e3a06a55d43be1a72c4f513c0cc",
    "signature": "0x92f18e0a537c242061cda442162396edf5282031d05fe362f58882584e5c922d52599ee64f1d6b0ccfd6656dd7b2c96bff32c4ed1cd7874c172e793183fa9a001b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}