{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xe6ddbf83555fba78afd3e4d662b768e88b4aa08510e79fff716561ae61f36b3d",
    "signature": "0x4c4bd0e191921e0873eee1478937ef3721b6e35aa9255fcb31c059be42e64bea57638bccb6b96c36df3a57f83d4f679985e23a4d974eb6887af1423d7fb182321b",
    "signer": "0xa4DC46FCAD6f12C17d6901fADb3826C76aBF186C",
    "userId": "193463567"
  }
}