{
  "manageEntity": {
    "action": "Save",
    "entityId": "460282622",
    "entityType": "Track",
    "nonce": "0x51c89cb057575220697171acafff47c84f6b1621ed447d8fb5eb5b8ab1f2612e",
    "signature": "0x3e1d2838e3d7574a949603c60ea740745049008282fc9753833cde7aa8433b92651420fb6b67f8e145b319688ffc7e3f3f52aaef105cfe2cae28c5a2860e6ea21b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}