{
  "manageEntity": {
    "action": "Save",
    "entityId": "411150443",
    "entityType": "Track",
    "nonce": "0x50731451412d4ae80debf18a1b3734057f7ccde9ac2ab5f8bc70b516bd28791c",
    "signature": "0x1bf0c84bb0546e8817fe103746b4794bc9fa63e67034a4d38166f07787d2f31655c3d6cd4a8d7ea942c82f206fca6dca7f682d898c3d39aabc4a76e5c135006d1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}