{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd3a41d557f116d72025359883636e6ede006de8fdda21bfe11926c65340c82c9",
    "signature": "0x16bded285205653e7a6c560ad1be3c28feba04521955db6c5895b9ca368ba04261364691b0bb5a41173beba80dcf82edc147eecbe0831cfbbef3c7f11de232d01c",
    "signer": "0x8fec59DCE6F267e709279E48f7Fd14d6A6f1dBCC",
    "userId": "600271239"
  }
}