{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "664568012",
    "entityType": "User",
    "nonce": "0x3ef1e4c1c06193a6d2bc82c5acca921f7e39ba7738cb5e294e5e0f756c53fb96",
    "signature": "0x671c2d21e9731c1beb6eba43d368f49edbc0901c83cecc4e4a06ed8147b560a109af3710bfc44d432a4c5ea05754427af95d6826d869df7735ae29bf40efeb801c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}