{
  "manageEntity": {
    "action": "Save",
    "entityId": "2118040614",
    "entityType": "Track",
    "nonce": "0xb52e55164df0ed7497a0950ffba61f2fff5a322e992dfa8dc3bc459369bb64aa",
    "signature": "0xe57fd92f57dc464013cf7754c05b5532878b19683c86a8450011864e41cdba0c580c5535d6209d2db1a8c45766d4f2da54bde05a2eff21c2b90f5190b32554ad1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}