{
  "manageEntity": {
    "action": "Save",
    "entityId": "810432015",
    "entityType": "Track",
    "nonce": "1786861904571964718",
    "signature": "0x2fbe0e6f9a5f4c8ec2b9edfc5f347d28d3f1aaa4c2313ae54c6e3d9de8c84df334e1520f3eba086872c14d46a10cd5503dac0cae6ec893651382ec82bda792bf1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}