{
  "manageEntity": {
    "action": "Save",
    "entityId": "1407335752",
    "entityType": "Track",
    "nonce": "0x0beac4621f994d060cf75bfbed61add54aaff9ef72e01061aaa2edf0779b08bd",
    "signature": "0x76cd6800374303bab5291f6aab46cde689e6605dc9be13b9e7e4e1e7428300a0644009b61976183abdfa3aad6055f686b49e532c4346cda2055a4918b59b87251c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}