{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648816889",
    "entityType": "User",
    "nonce": "0x8a142523dee416aa1212fc4fd4f14106080e68214f7dcb196473d94f7662f310",
    "signature": "0xa972455fc0c361afceece2a726ec918d61d4620a5b656189c0abba3f632860ad2b6add67806d0dd98ff31af13336a54c81c687d6830d228720706384207175fa1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}