{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "821853407",
    "entityType": "User",
    "nonce": "0x89141f6c31433ccde927c0a8c5400905bc491abbf50c4405490425d85156cae1",
    "signature": "0xa8006c0a257f1d3c6f8cedfbd99e4dd0bf5092d736373c5c66df534d979ca5a47b43c028cb81c75013aab218a64e0cebf85789470f8cd2278bc5d614fe4433e51b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}