{
  "manageEntity": {
    "action": "Save",
    "entityId": "2027569400",
    "entityType": "Track",
    "nonce": "0xb1a21f1a80b1f03b4dfcfc895a0da65a60182c404e467061ef973d8bc7d8a605",
    "signature": "0x00341e79ff707ea1fa984ce21a1726da17a339cfb4884cebcd3d994df6fc45084ec5b9029c040a1f542211c7fd65876f18fcabeedb19c296d16ce069fd1b398e1b",
    "signer": "0x2FBbf17ca409dDEb6FeA2766042a0A7cf2Ddbe83",
    "userId": "8223"
  }
}