{
  "manageEntity": {
    "action": "Save",
    "entityId": "305155",
    "entityType": "Track",
    "nonce": "0xd6b0c3d3c4e91b157cd7c566722c247b34ccba6b4407a11c9d6586fe313068e9",
    "signature": "0x385cfce9294d615a1e563a0b1e7c2f0e8f82048bacce40511d1ce8ed377f319b7816ab99f48299f6f67af65493aeb5ff1f581f611a75563ad486b12ea6ea919d1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}