{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "19151",
    "entityType": "User",
    "nonce": "0x57e8ca51a2b7f38f7d37f1410ffd69e241aa2bb61579769d8391909cefbd9935",
    "signature": "0x44b1b5c6a45e41d9a50a711cf2ff1a3c7dd06599ed43e735e9c016afac1c0e4a3bebc09d65ced034ccb7379e7b7da044b6ecb6bde13da15d04da9d46eb3a31641c",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}