{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9eef2104ea59c6ee00d17c0d28d2cd0a6a3595f1392df53402efbe74834971dc",
    "signature": "0xff8c8156f65ecbbbcf0b3b6e3cf7e9559a30dc67bd019ac739ad780dc9b8f9b77e4ad479da213de5385f60da0f31047c3a83dfff32cedbd8adfb72cbe7be1f5a1b",
    "signer": "0xD573be32854117F25430438184360Bb17948aA46",
    "userId": "327324142"
  }
}