{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "189558402",
    "entityType": "User",
    "nonce": "0x9b72d7204abac6b2a7b52ebc230d32e12400f499704484ea5f8b619cdb73a67a",
    "signature": "0xc677f3d829a3e21510166403b842c82982b128b7ff0cf1a91fc8295023103aee78ac32ff561f9b7f272e8c8ab60d2f4fbe3547c57430b22b9b71d517dd9d1d6c1b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}