{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7fc103f48edca93bec74a23bc44153ce9fda154891498535edcbbfa6ba42fb58",
    "signature": "0x03454018314461b4b1dad64c46d0eb4ff8f792b5cdbfc897b99e6ed310e9290c56a4ba59b1dfa8580e6bdb49df20e4c762025a24ffdbdebe6c19aa18bd644e611b",
    "signer": "0x18c2052af8C4c04678DB2Bdae7c2a5415D323675",
    "userId": "909969620"
  }
}