{
  "manageEntity": {
    "action": "Save",
    "entityId": "209793801",
    "entityType": "Track",
    "nonce": "0x6285bb9fa9e302a80158d7122a23e0bed31fe5de8745921c543e27e47b6ba734",
    "signature": "0xb1366b571628f77f3c4c191c33826f6158009a840c41f7c5f072da5c92b20a765534830677ffe573bd85f08577902e74cf5398c2a37781409306a0c8abdcd1701b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}