{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1903304",
    "entityType": "User",
    "nonce": "0xd52dffb200fec87e76c8563476ca501065e1cb5d78d476e2dcc1f1c593044cec",
    "signature": "0xa1aa53d43eb456d8fc202d413b5a87f8457a509fd1999d31a3a59bf4120c24ce630e002678f01f468634d987ee68a06b77b17acedaca9420b988736ca2c246eb1c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}