{
  "manageEntity": {
    "action": "Save",
    "entityId": "699704125",
    "entityType": "Track",
    "nonce": "0x1283b5cbe9d0751033e67aad52d2c2315ab819300efcf7b29dda5fd43fe84d8e",
    "signature": "0x2340c1c5a274bbdc6e12b304ded7232a89a45d147683a57d9469572f3d5fac692190c09e5654d3941b852dc893122bb4287272fbfbbde2e8e03b2ea7b267c56e1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}