{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa8e5b5f400cc4e2995f4ffe70e2d8e1a7a124dd2dc08bf0799a8b6bd8048fb5c",
    "signature": "0x60d68edc1e3b40589bc32f7759fd4afcb5a767690a2296bae30b647a8d0db1890886a0048861baf26769be5b744920e9d868039e79cb62bf680201805efbc9bd1c",
    "signer": "0x881DC02014d371dB5F53a35eB20019b0253C7d40",
    "userId": "637221900"
  }
}