{
  "manageEntity": {
    "action": "Save",
    "entityId": "194238961",
    "entityType": "Track",
    "nonce": "0x9670e4ba7ede53820b10cff14488604bd95dd936091b0aaaa94ae2f52f21b16f",
    "signature": "0x3e111020171087eb04108cd4883c8bd8f230908aa4fc0c0e16d6f5aca923f18c3b9b32c23234936809b1205d8bafe9b1713e8cd038efce6958ebea09bd0a48dc1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}