{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "999548897",
    "entityType": "User",
    "nonce": "0x3369151e0c0a46f8798ca3a64754703484132a72f40cce5cecf5689cf90f67df",
    "signature": "0x13314c55fcc03d620725812e64334fd3edfb77d45e587fbc42938e48c382ce0331818329ef3f191e3ccfb655bf7dae54c5daab46558210b09ccc7299489e12e81b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}