{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9b8b97775a996789d7ef1d401dde0a58d387eb31cc2d308a0cf0d9e08b8d1e19",
    "signature": "0xcfb0df63a5274ca7629d8aea7aa9a24500905f2c0c0b757abcf51938689d983377485faabc4b4b02bd8aff60666e6f617bd8034636b9ee8e4d76d779b68aa1211b",
    "signer": "0x69F642f1FbaFC3710E919da223b90DC0D5eD7a1e",
    "userId": "748581512"
  }
}