{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "743456",
    "entityType": "User",
    "nonce": "0xcc7572e6223cc647da6599a69e79f77aed91b8ceb6df92d275e6de4c6a6e8d25",
    "signature": "0x8957ad61a02b7e84cf09b88282161d4ccdee52e9b087659d0aa293accfabd8f062c5a1c704ee776237f6de4d6e8bdce77a0d87060c20bbfaf8b67d50961cbcf61b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}