{
  "manageEntity": {
    "action": "Save",
    "entityId": "327848567",
    "entityType": "Track",
    "nonce": "0xac497637d5ca1b6729550905d1e9ac8cbaa107a19d48fe351244f512a4b139d8",
    "signature": "0x103d0f2dad16e59f0627eb4fc9c33085ad3f2d38744a56c5f476bea75c7f5907382ed42ca50a8d2be1af613565fe3a1e1820ae6868622269f084e5d3e4ec22b61b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}