{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1f17bd76436bf9702cd04a29291e9415f4a74517f33707dc09efa8d579765495",
    "signature": "0x1e59838463bd66f5390f7baec32947f25325747520c3261c644053acd9e796732cc50186569cd2d670f3d4d2eb69f802d028a00df8c6138a621d33c20c8052681b",
    "signer": "0xd72E9643619f34f48f752ce1b590024878642830",
    "userId": "571151335"
  }
}