{
  "manageEntity": {
    "action": "Save",
    "entityId": "358164599",
    "entityType": "Track",
    "nonce": "0xf33ad88a2ae0c3590481d31d10355735c5dfa2cb6314052297df51feab59486d",
    "signature": "0x934a0ae733ebb1e0956c8403772f32bcbaff3bbfa4a1768de17fbeb848db45de4fc2374258bea35c9e67e362d99f37b91490529661514effe3596075a45c8db71b",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}