{
  "manageEntity": {
    "action": "Save",
    "entityId": "737029",
    "entityType": "Track",
    "nonce": "0xa20dbfb813a74624fe2fd775188dfb068276feb87ef7f22e6fef89d08f2c451a",
    "signature": "0x25f45e8b4e6caa15bbdcf5eb7ad957977567fbe5560359cb402fa08b35ec7c9c77679d06d6ba5b854caaa276b5ae43d898f7e88e4a6cd357ed8e20b793676a3e1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}