{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9daced660ccfb2c6e34d56c153430a0db16404c8974b1e915e8216d02ba1f91f",
    "signature": "0x585e41cf171cc2a36f521ac643e24bbddd3026ea608d13317338974fe81834b61e6fb0f3268ec3c2f1aacc9c5a54c5f1920c411bb89e7af8554f42f4bd8df6c21c",
    "signer": "0x838c3a5d208187e094325179bad85fd0912673A1",
    "userId": "20400094"
  }
}