{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x28ddf9dc80af934e6121eaaf1ba2a5b1057602f86a8921143cef5f9dbf5bf915",
    "signature": "0xaec8cb589511573df547f14f3ad1acdac9442f7d9d84c0f356f813229e6051fd54296d85311c58baa77b7ec2cc9828f52aa40be02cbcdb0ed446aa36a9a234311b",
    "signer": "0x546690a449F7c233e1d182fAEa6cAd5d6f5C4223",
    "userId": "100733685"
  }
}