{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "872142418",
    "entityType": "User",
    "nonce": "0x88b62b21abf29eea1f6ffc578d8eb5d43226210ff9d877f1241fe4866ea102a8",
    "signature": "0x1f8f5926da3f31011605fe7166c43e27db3ffe706de4343b8a5971788bdc26ce6d71fbacf3a68730aef5db1a7cafc439e8d5ba45c7a140f70dc43d64aa62c1481b",
    "signer": "0x90508144365a4b20f9909C3C9b96a5aF240cC9F8",
    "userId": "330534898"
  }
}