{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xfdf522c17aec4319da7305b56d008e66210d6fbffdefaa7e0297243bc8a9b177",
    "signature": "0x5fca1e6e8e492745c3be8b76154601e801295b3b546173d9fa4608c2a41358426740332e7fa080fc3d1b675b81c07427d300e5b1c68c197fd4223c6302acb9a41c",
    "signer": "0x447887A35958D25Fb5B659937312606ec7E55dBb",
    "userId": "999396914"
  }
}