{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1882400",
    "entityType": "User",
    "nonce": "0x54f9c52ef418dd14cc6ebd9639b08122685db9178b1589de7a6cc47ba8c6cf40",
    "signature": "0xf2e1f1eae19c1b823ed56eeaddfdefe048580a32a7c920f7db6aa9a9ccd55ec206e4f722595c1a74047faa92094aee478976f6529547b2bf82a74050b1464a951b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}