{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x3551f96b1765ff9389c51b70ddd0cfabdbdb9fca1cee5ed3765b3ddfb298cae0",
    "signature": "0x1aa700dd7b8156174e7cc4e101aa9b45390c59b1c1e262f4d3db60db3db139c7021a22cc203ada84a34d9c609c9be75eefca87500b99db186d803231c046839a1b",
    "signer": "0xf76Be3e57D30ebb176cA7D31f49157c7f56E6b0D",
    "userId": "204302128"
  }
}