{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5cdad35fd0e1d0d1074ec18caf5a726ea3d0c9362f1af3a3f428118d88c440c4",
    "signature": "0xd1acadf2d698389c66fa4ece891a10b99dfba3e4bb1b6c5dd5706c08906e6ada6b28a19657ab61c5f8b87116e5504b305fa01c8ad10246e16443d76cc06a11ea1b",
    "signer": "0x5003c3889C8fe2A63E57503dF91F8d33eE14Ab9a",
    "userId": "619555289"
  }
}