{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "335392",
    "entityType": "User",
    "nonce": "0x8cf4b58d1e9206b7d195e0d313199ad4fbcc2783e9517126a5fcdd0419553f0e",
    "signature": "0x53cf5f5a4742f723b94ea9b3ca419d78a17a6f8185ab54802935bd49686599b8391b01b957e06abc8fe6a5449abc076f8ca8b126cd582450a309c7f4e520dff81b",
    "signer": "0x66310c3C430B9B1A2eb38D9c85159554D3C9D4C7",
    "userId": "823577399"
  }
}