{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "621",
    "entityType": "User",
    "nonce": "0x6b31f4dcf7e616d465371092c0528fa4c5fe7d37d4b4ac4490f97be171fc5845",
    "signature": "0x157551a092c9f3bbfd730118011ba7b0f76f651e0687cf635e3e3cf0321d07ee36876a1dbc580103701809969dd762436d909538a7297eb3fd3a5732f53958771b",
    "signer": "0x24844077bE6bb825c0548F36B4EFA030d05Ee1CD",
    "userId": "601282125"
  }
}