{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "102143",
    "entityType": "User",
    "nonce": "0x19d77f31124de24d7a5b0d2e5e2cb4e6503615abcb56392b0e0069b6d4383c3b",
    "signature": "0x3e406c599c5e99446c75a77761ff2501bb3bf34f25a413bd3f3218f4ca7ee8ba386dc1787f998b7d610c41b1f01cca6e5b1aca6a6679bfcbd5620cfb228d594f1b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}