{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "763473",
    "entityType": "User",
    "nonce": "0x1e9b2986e9d56840a2aa089e7dfe0650238001a39bd18649a553abf2a07b4081",
    "signature": "0x4c62ad3291e445db7c859d53b88e28428791f4cc2126a9fbb8593fd87b4ad9fd193ea31aa2fda96296a19cbfd8264fb81415a46f3479d2d8d6076088a6ea1e701b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}