{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "902468591",
    "entityType": "User",
    "nonce": "0x6f812f3eb4edd450c213c464363a96ab0db3ca699a9faf7b5c1b4607c6edc6cb",
    "signature": "0xfe3da848d5046cf792c1f637321c8c5f12a27e06e0c9afa4c44dbcd0c4197ffa1ea58bc30d8214e75990445ed72c0fa9a9d1678c09d8e654c6f08208d01159ff1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}