{
  "manageEntity": {
    "action": "Save",
    "entityId": "1187873171",
    "entityType": "Track",
    "nonce": "0x4ffc11fef3706a5f1a2ae21b09108378cfc2c98bec71afac3c8d7fcdff1182a5",
    "signature": "0x6b856c3c810e900764bc6866712ef02020e9912d1e9a43234d66e045a1930cb1753956d6808155d2470a61147ba9a91aa0647dc023b6e44dd01650cea73e33cc1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}