{
  "manageEntity": {
    "action": "Save",
    "entityId": "567762350",
    "entityType": "Track",
    "nonce": "0x6a9d408c01d3014d6f5889e4ed9d62e487c2eee4c0b4671f3ee03f8cc175b546",
    "signature": "0x462508c6cdfcda687ca97375050d29821a82cfeeaedff70168128c8c3e56415f741e0f59f559c53c9d13cfb74c80090c6386c1c140e208145b86db8fa74459161b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}