{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x140890ce67aa1296cb69c80d67ef3c38ae0871e59b34b0648dde3746e92ee862",
    "signature": "0xb2342163054cbda3011cc5e251874bf935c0ee3ba1f0c49c355d3a82a065658f3687b3a6643db7b7e9edf734c298ce98990d805469992e5616a1dbc41e8e4e461c",
    "signer": "0x6e23222409a5771691c6C888A82af4A2123edb02",
    "userId": "888206337"
  }
}