{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121616299",
    "entityType": "User",
    "nonce": "0xd2d7408bdeafd680ae0cf6c825328e00c3f8c7bc10f91c93b007c91bcde9c29d",
    "signature": "0x6487e0151054fd5fdfae40a8636d1c05a7ceb6b01fed3c49981297e77f5445894ad3e8f4c2851bcd19bf887586ed2777ead16183aa8711f431e6511e3c50c88e1c",
    "signer": "0x45f053EE6d99e48800FdabfC3da995B364e9dA54",
    "userId": "628434403"
  }
}