{
  "manageEntity": {
    "action": "Save",
    "entityId": "350797645",
    "entityType": "Track",
    "nonce": "0x3950d17545163c2bc3a1ae24e5a7355305e16025d3decae66d1078645a4ff4e6",
    "signature": "0xb10015bceafa822fac018531cb745b5a155a16927e2618c7e31c3239e8ee43cb057be11a88b9061a473ece4a704606e40da7b4dbf1dd609a8df237564e37f8ad1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}