{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "273387437",
    "entityType": "User",
    "nonce": "0xef7de9a34130d518282b8e604d15cb7436423a451720c6da6ee2086ee65e1451",
    "signature": "0x4dedf7e5b08202d9145c2da80ebdf2b54a97ac8ff5a03d223ea24ac8673107c17c5f181f8d28ce2b4d823658eb87e96c27ad2d7b4f987b755ced4324920029f71c",
    "signer": "0x405A18E09D8C4100F2412f37001497351EcE9C2c",
    "userId": "21357518"
  }
}