{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "391242",
    "entityType": "User",
    "nonce": "0x1ffddaa95fc37639e13ee30a745e0818130b8d03036936a07bf02ab66610a7ff",
    "signature": "0xe551367c3e392b3f04109d639711d3721a3a38bf7a68266e1d2e9e9f11c356e47f5c3e52b56c0a9118e42395508608b155004103adf06fe9b982ad0301d71c541b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}