{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301637",
    "entityType": "User",
    "nonce": "0xc146f805a91cb9dc286e930d088768f46932371983b0bcfdfd2a442a51649442",
    "signature": "0xed7dd255172900be13185defef5fcf8c4f78393e18370cec715bb195b3af074714c998ed40a6afeb05d6f61d1e6fd17cbe88f5dac1ddad03fb5cdc6651dbac531c",
    "signer": "0x8D46758848B46fD16d027970035C88c708E03e3d",
    "userId": "870591918"
  }
}