{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x05b332cfda541bc7d4d9ce16d6200cbcc684f8466b6ac71d685b10e54900e33a",
    "signature": "0x5b366a85b5221c50648dcf2eb5f079c4f5eeaa5fe7424bab1ac5511aa92531c82d13dfc726a9b495275280dc3e796a6a1b0d2e1e4f21f5905ee600c0f0bc33031b",
    "signer": "0x4E073b7076371ff6Bf848d0B4abA785B38B5ff1E",
    "userId": "303393509"
  }
}