{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "621",
    "entityType": "User",
    "nonce": "0x0c730512358b9e90cffded63fbffc55b14ef02eb83f4710fc7cf9d812e1f2e32",
    "signature": "0x78fd968150e8ad6a544304bb438dcdf06d15c2974dcc9b28e7531056428e5dc1055f9abe5696f4d478abf1b58973a19765e4f26e87416687e2f582f552d844911c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}