{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x203955fa08602ce231dbe5b0c821150178c0bad2a5581a8ecf8b883bfab39b79",
    "signature": "0xa398fc2f1b13728afda34b7c89c6aef80910911b343af54efd9526ac73e182414dd60b91a79c677d9ae715871d052c61942743ca3fffeddc6f261a66ae0182401c",
    "signer": "0xD08E735d78f9B1D9B553b1Da41a4209c791f639b",
    "userId": "51295028"
  }
}