{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "752810",
    "entityType": "User",
    "nonce": "0x49da4c20f637e2160d3923626ad8e4ca429ce76b6a0b3ffd890b1c9dcfac8a38",
    "signature": "0x8d3a696b5ca8237e98a387de62deff808eab7f8ac76ffb651cb505df48b9dbd356c2fd03f06a7645b242981604773ea175b018e007372c8abcb998f9a08025481c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}