{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "403396",
    "entityType": "User",
    "nonce": "0x7703a90b83fd677837f86a3a8cfc9a53936c7b4d2f83b8d8213c5bf4e1ea7f50",
    "signature": "0xf07c98a7d15dfb467755f4999cc3c18ff25b9a278cf587bf70c5e3e6cfab53ff47f470c2f937a083f745cb898599aaf92c0a0fcb2faad340b8cae91cb84064eb1c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}