{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x551b6c621942eb726fe40bc448432d8733b49010d052de6018458f2868e80d4f",
    "signature": "0x2a1496f561c706c19297dd83766470facf8c0ab0d10f0312baa4caa4e92e0d6f3412e22cb1305a2c91463c6f3253f6a29df4ba4833366ae456e6ab7801120e871b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}