{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "991821949",
    "entityType": "User",
    "nonce": "0x230eea06e0fab287b314dcedc030df4e9444db38de27863cb1859bd97c3331ba",
    "signature": "0xf040dba641172b70701b2286826ba7128678d9d4a235ccdbff1d427daf1a31cf4b904823ae3141408a32bea0f6703848a3df94e57b2b12cc590e67d81ccd3fdd1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}