{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "345619628",
    "entityType": "User",
    "nonce": "0xe7dd7ed1f7ad1997db6df9cb2958290765612c6ebd45b83ac3b336246ab74b93",
    "signature": "0x9e2b42f4d85120767f4f8cbf6429bedf61090dbb6c35cf4b608719fbb345f29c25f213949c3fbeee08ba0a30f945effd957223f84456f673bd288ef15ba231261c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}