{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x2a18822e8ed59f7bca83749f0708420a3808620b770d77a61030ac0a88f32cbc",
    "signature": "0x923411171a253e0496a83ab1df88855c0f6c07a3815827150ce63cec60eedcf004f4a139523662517656b33a736dbe682f262d79a4a13c54b39f647242f3441b1b",
    "signer": "0x7a78569646ADa00a4d555F20fA48e9cDb9ef14F5",
    "userId": "333304008"
  }
}