{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "300658979",
    "entityType": "User",
    "nonce": "0x6d2cc0bd35ebea3f2dba4f2c3d3117e32f7c3896240853dbffb844de1834371d",
    "signature": "0x469ac4138bf20784a235c9b7ee0a114882b3906cf9f5c1b4c1a37eaa464a479f35ba26d53e93aee065886e2c7f68de046fa2f43296e678c042440d1f8c9d671a1b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}