{
  "manageEntity": {
    "action": "Save",
    "entityId": "220302807",
    "entityType": "Track",
    "nonce": "0xe306d5ea3d5dae478a7caf1483cb96d07030eab0586a3dda95f1211f8f9ec0ea",
    "signature": "0x706b71a5ba483a9fa1ffb30d39890e78f87116d27d57cefb8d3749026cfa671e10405dc2442b89d2e2a7210a2cd77a5ff7dc8896c2dbd31e56024d8f3c8610ae1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}