{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "516843970",
    "entityType": "User",
    "nonce": "0xfde9c54d82146646fd3caa2d1fcb43c1c297ba020e161c959914ba1b2f7a8ffa",
    "signature": "0xd8021e3cb6ea1e07f01874d12a137c927b26317f36274e43d9103219094483432298a0898d9ad216dcf3406269383d5c82d90a8b0f10806c1b366700448d3c291b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}