{
  "manageEntity": {
    "action": "Save",
    "entityId": "444395723",
    "entityType": "Track",
    "nonce": "0x276df29170fefa15b8c0c4f6ba9369541dc0cd2fa10feeb398ec45170084af8d",
    "signature": "0xcd78f17dbd1b449cb62979138668936606114e913a1d598786cf212fc64a5fa91ef72f93a730e43f5ae8ca9b7aca185b1d41dca0fc65ce1a3b2301071b41ec8f1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}