{
  "manageEntity": {
    "action": "Save",
    "entityId": "252060",
    "entityType": "Track",
    "nonce": "0x4341d6f9e31b30eb0026f38edc45c685dc3b78bdd07e7f84d7181b1536695bfc",
    "signature": "0xb39c5406c67f6c244e43bd873c1e92c181ba9e8c1c31d8c3762c80512a939c165714a4877ddecef3e2d3e751f4883aa5a63bae4cd39aac0dba5bae450e12a5851b",
    "signer": "0xDc7aDE20DF7b99BBB8cD1f87ac9FfAF2049d9132",
    "userId": "666927821"
  }
}