{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8b4f8bcbd9fd4d11ec65a14f500df5bfa2d1ec6a54cb57152ea8e7631797e210",
    "signature": "0x1352aaa3effd25dc10d0faf95a6e144010ba6cf41bca78b32ef167a8fbfdb9b772697d8b501380ed2d8777d2f456d0695a91e5d58400237258c9218c58d9fe891c",
    "signer": "0x0fbE9bd9ffB9732d253D75f0eC57dD610A639013",
    "userId": "196548723"
  }
}