{
  "manageEntity": {
    "action": "Save",
    "entityId": "57192413",
    "entityType": "Track",
    "nonce": "0x84a0dec8718500d8432a818c2b5afa23e900c0517aa2e3ccee4da22792d76526",
    "signature": "0x961fc1c49d307ea363bf63a2347f577034ac75ac7c004528bba4252e016e99c03aadf85a1d86a8fa1b5a89427a4f7e7b2cd50fbef19efaf5736e273df03ca6071b",
    "signer": "0xC1896EAF7ae2431A08647A163291b5a8A0cd2a6C",
    "userId": "185209372"
  }
}