{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "337714",
    "entityType": "User",
    "nonce": "0xff1530a677e842dc54c87e119340d6ce59018f3a4209ae87e67d3324bf4ecb68",
    "signature": "0xfc457919d08dffbfb0b54b1b8148d761d88e4af64587726589bf6332cf149e56495820b8f82050b5dab25f3d803d98918d2711a98290264758cd4b9155d702981b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}