{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "506789556",
    "entityType": "User",
    "nonce": "0x5681ec3074c514b5eb11bedb566603923d06a084ba339e370bd11a121ebf56b5",
    "signature": "0xbfbeeea958966827a29bdeaf3e4fbaf05de27b3ff7fb7beba8d2bb30c3a4b6317ecd529af74f99d21559c45a28ae463017d4a740b43c5b0443448f1b66f1071c1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}