{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12",
    "entityType": "User",
    "nonce": "0x612fb6b22da812f00161ee6c4d32af84d77cc644b49d15c7c075d22d6fb95caf",
    "signature": "0xf4cf39150ae9097b36c9102f41e9305ba3a50349b93a94a9f0437ddcaa90236f6c559c13af1593da3969ef901ed6a71f820c63d5cbe7aa92f14a095dd0873d8c1c",
    "signer": "0x52F331C086a11941E738a6C86d9F127E934dDEB1",
    "userId": "281470566"
  }
}