{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "334539",
    "entityType": "User",
    "nonce": "0x89c2cbc2939b3208ea93128343a9674b7612bf805b47404271314f39952d45e0",
    "signature": "0xe708f824904a4fe08ba062ab1a536bd33ef7d81193aaea57229e1ceebf1731ca7ea788c0d6cb55a03744ebc1094ae329a64b1efcd9d61f604bb88e408a7aa9b91c",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}