{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xec9e1ed8bff6c12f6674594c2dc687aa1229fbd8bb50b7c557fcbda78ea0e0e7",
    "signature": "0x230f658c1cc5b35c5a48e20893c0b08057eeeef51aad06b82e4bd756c2d1b1fd42b287a23701877f44407e4d722a2ccfea3066a2fa68bc59afb4161618541f821b",
    "signer": "0x24844077bE6bb825c0548F36B4EFA030d05Ee1CD",
    "userId": "601282125"
  }
}