{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1873428",
    "entityType": "User",
    "nonce": "0xdc3f9e06a8539bfe1b3c5ca863f81fcb77a4792e1b49657d99e86e55713a9b58",
    "signature": "0xe86301db6ef2c139d91dbbfbd6121f6015ed73141f2f774ef9617c2e400dbba446e9910d22c18abfc8de403d1acd24bd79045b4c6fbda5c3e989aba83df2e3dd1c",
    "signer": "0x07d7a46761dB78DC1d68D03aCD251A2800940A5b",
    "userId": "199549318"
  }
}