{
  "manageEntity": {
    "action": "Save",
    "entityId": "586319189",
    "entityType": "Track",
    "nonce": "0xbdccda9ae57a528a27b73681ae0c13750208eb667d1947a54fb2006d37bd7168",
    "signature": "0x796c4608ffaffba1d971cd64e95f1a8f2f75be80d9812b2108ae961f2c719bed2360837ae2bff491b52f9f76d8f3eb824d550c2ed4edbb686bbee56c6a5953461b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}