{
  "manageEntity": {
    "action": "Save",
    "entityId": "1178978870",
    "entityType": "Track",
    "nonce": "0x95bb3dd72e2e1a7bdc3a32fa52be093cdd03b49a868db8cf11817de722dc51e7",
    "signature": "0xa5239267e374a44adf6df5519194eee9717cb6931fcb4bc51b61e57e8880cc9073899c7ba8d09b611f314d9f3e3a5ad619610ce5450a6dbacc1c1209408b51981c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}