{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "395602",
    "entityType": "User",
    "nonce": "0x0d21e75161d0672b20e6c2fdb13b2e8591639a93634785a5036f3ce8a09f009e",
    "signature": "0x5b50db8e9d2e12313619c5c2ab09c385441d00e117b426a220d216270ff06c4f61076eeb28a32a0f06859c8e5cabbc546c9ee2b18d032a38eca64b81b0b3d1da1c",
    "signer": "0xC5d18b553bBB15AF66038908A658cA6d2A61438E",
    "userId": "603509540"
  }
}