{
  "manageEntity": {
    "action": "Save",
    "entityId": "2125245630",
    "entityType": "Track",
    "nonce": "0x63c8e574df436c033657e5ccff42c30d2c5542ed4b7c994416dd88ddc777b8cd",
    "signature": "0x9d8bf3deb524e8eee4c87259fa7c0b0be5762f2b8347c23d3cecf1e30369859a3fe20cdfe0ea9cbd43958d0def1729f60f31dfe3614ff6b9cd6c207d698e06091b",
    "signer": "0x595bd440e30C8525027F5B7E75bD489aF5889824",
    "userId": "265275744"
  }
}