{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "889307575",
    "entityType": "User",
    "nonce": "0x03930b69796cf39e0e5815179975ce7ef62425acb9d11bd6aeec099d16d1af0e",
    "signature": "0x611c55efe62e065539e5a678784ea11bd6415ae28b2b1117abd04620428044831dc992ff3e99497de37fe7b993ca0c61045a037831644b096c26f489129c3e871b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}