{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "654055039",
    "entityType": "User",
    "nonce": "0x3756316797eec15ea8dbe17209f9daf26c7aecd4e2452c754648b3cdb46ec826",
    "signature": "0x2839f8a4bb7b43c28396ebf0fecd9bacd95c5d542c4ee516f63561457b1fd4e9350bae3a34be161942a4e0458ce348f30bfeeda7a83b20fb3dc31b7a0071ddb11c",
    "signer": "0x5f669126A64334710E37f472BfBfE0D8cF408577",
    "userId": "171892"
  }
}