{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x498c78d4e967587290fea052284bd74ec3d7739fc1db9b9e23b50c3f151b02a5",
    "signature": "0xac673d171c0f88e77db7ae9f76cb0f1a5cc49c587774136225fca8d312a46de00f921368ee2200a1047494edd8ab5699101418b35f2bae7f03cc5d66dd010e621c",
    "signer": "0x31E393dd26E437b0818feD0Aca1845508308c43D",
    "userId": "309195321"
  }
}