{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "428192787",
    "entityType": "User",
    "nonce": "0x3265a8f2ac36c7a9cb8f5321e50115cf579d7d29e4c996f6db5de6cbdc321eef",
    "signature": "0xa44f5789fca4cf85e1c0fdc7ad45d839fd49a4e0b745678b634346472775c82c4f44517b090ff04f87607227dc5dd50ee346a580627d362f122ad53dc738007e1b",
    "signer": "0xdd9866f5231155D8450f557CF6216590fAeE2900",
    "userId": "697765896"
  }
}