{
  "manageEntity": {
    "action": "Save",
    "entityId": "1112809",
    "entityType": "Track",
    "nonce": "0x01d69d2c3a9df3d3f370b86c3ae3062c43bbe413298d27dc14cd6399a28bd7c7",
    "signature": "0x90e7abf1e98012c4c756bbf5d08ecede5e04d21f2ea87c941a03285b9a3db86f66ba8aa24907239189723a94c50620cbbf70f9f78108cf62115791e5c5eacf9d1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}