{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9ac705b7a18a064ca421be9b777c65ac56a7bf3b14dc955f52c10f9d9f97c085",
    "signature": "0xa85726f94d4a72e591d543387d0347db200ef5256c4b60dfd2ece8907f9dd523258d14c64a12cb22ce482ab5dcebac584fdb7ef7439a2573c49efa8dbdf7ec1d1b",
    "signer": "0x4B140b61EB41438Cda0Dd10473ad1334309C1b97",
    "userId": "45511108"
  }
}