{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "216840",
    "entityType": "User",
    "nonce": "0x53f5e3d2803b75297adc13d1cfed6b003cd8a0aeb8ba6913b5005bd0b811dff0",
    "signature": "0xe011d46cb04766349704163957a4b5cf07b63c73a1af56a67e66f00b18dbd09c0b5aeed013e569446dfbdac6d2cf12c60dcc358c3d52aa0b7f55355a12bfeed31b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}