{
  "manageEntity": {
    "action": "Save",
    "entityId": "682880700",
    "entityType": "Track",
    "nonce": "0xebd5d50af9860a9d07e3284f3c9da5b8a9df47bedc1656127d251d772164f9d3",
    "signature": "0x19aeb78e51bf5b4c55bbe2b67dab8e6e725836caefd5c87596778099589a81426722578e3cd45b5663dc531d03385c0b24901d3f9962d2ff4d896a66ac8844c31c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}