{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x83833f04c4cb234fa50a2e8e6ef8182cb0c005a589d6530d0e52e26f5704f693",
    "signature": "0xab2d9ccd7d92bc4e2eec3b3ec63e63c97a79315084eb28c982aca9a92c2c38971f730fcf0cfb2ef6bc8943831140dd20b1add587e26ab3879dcd3d54c9d6b1901b",
    "signer": "0xf7aD967731Ff4B50Eb0128205CBD66c9f755C4bB",
    "userId": "467916987"
  }
}