{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x77ccf79230c453ec26a1d3f0965cdb0c01f5fde7f43b73b87ce19c69b8fc5736",
    "signature": "0x1fb1d30a684cc39eb2ffe4713380ac5ddfb2665d6da9695b0e2a963316905b796954460e557ad3b7cfce6f0c19836bdb1a7fdfb946adbfb2ba8be58bc94bc22b1c",
    "signer": "0xa8189812339C15eeA66c9f320283914536DE16a0",
    "userId": "27678437"
  }
}