{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xfd4fae599aea33530e2771003b46fd10f5f2ccc3ded15a367239a20acd7fb43e",
    "signature": "0x7a28e82b4c530620e2e2807428c27b02272ada518e079cfbaf4f96a5cc9ffa8e2269e3bccab05fb10e3e0e10c1424edc967343ef6bf3eb9f18f44ba7c0ff0fa91c",
    "signer": "0xc2da9F5464dC501443e5d87E402719bb594A9C8B",
    "userId": "821374868"
  }
}