{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15642",
    "entityType": "User",
    "nonce": "0xcf1b3cd76000eb3fe991c5571e4c81ab5d8cd11125928c4d81781dbc283efe93",
    "signature": "0x44f3dc38ec007c2c465f2ae453e5ca5d9e02a1b6473b2cac268becfa5565123854db894254b1a0ebdee4280195dec01b1b0361d5bece184d29fa9309a0e542a31b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}