{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "512214950",
    "entityType": "User",
    "nonce": "0xd0103edf1a9d5adc81a8e655252cc84539b0c3c976f987acdfe922688aaccb22",
    "signature": "0x1a458c0a5f55aede4a62983a5aea3bff84bfdd2128787bf952453fccc08fb4fc5b8895e098a1913655e2eedb9b5250aa5b1d2e87061567607e94217e435371641c",
    "signer": "0xeD4de8C7aEdcca7a62a5E17Fb9DF5ee4991E5b73",
    "userId": "209405413"
  }
}