{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "712556959",
    "entityType": "User",
    "nonce": "0x5776897ba2e8680e13ce1d0ec6a06f5fbf31ded58d564f5a40f8494141ffdc51",
    "signature": "0x7f3b721f7ec24a4947ccdcccf6363aa917f5b5f6a3de326bc240381efb5a823b17dc67f88b9353cdf20855325a6911f22c2d30b3397a44e6324f2b47395af4291b",
    "signer": "0xFA54BdDbc2fd0fA514bA36393EF2F5a80Ee9C49b",
    "userId": "428192787"
  }
}