{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "8519",
    "entityType": "User",
    "nonce": "0xb2f289c2a34d9ed5c94eb0d4a4f3f767d64240c398f4e4e5a312390bb92aa76b",
    "signature": "0x16380b9eef06dbc7e79773761e5423554e39223fd12b3fb5f28e4db127d2cbd611a859368dd5c8cbc2dac4a7f090716e75c88188358a78fb4833adf9011085a41b",
    "signer": "0x55F8937EF7902E83b15F5BB7c7bf72a0a2989C54",
    "userId": "233666542"
  }
}