{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "345493",
    "entityType": "User",
    "nonce": "0xb66a78443ef4583de02ee4f041218f1150d47378c2712fa630af0b409625fd27",
    "signature": "0xefada399d5b4b1e0a00efcc123804530b5b53de39b66228d7805196263e8ab3774002de55be8da13ac39e7b32cc5cbc50032102270e4664e441a8237fc6735481c",
    "signer": "0x474B8467757bEdBa76afC2394cfCb801C991B143",
    "userId": "815537464"
  }
}