{
  "manageEntity": {
    "action": "Save",
    "entityId": "849513247",
    "entityType": "Track",
    "nonce": "0x5665a5727666826c32191b66f2cfdcfa74e68c68fb79cd5efb2d1963edafe037",
    "signature": "0xa11741291bcf6215b85fca132671da98a217f4b62e916d5c6b2ef8d207b16f4672b32b50fcf090c613a1e0b8d79fa88bd4609d35403c3dcaf894ac89744ba7de1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}