{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343",
    "entityType": "User",
    "nonce": "0x5d13269ed57853e7ebd084d78669d970752567f890754fbcb8d5f85389bae4b8",
    "signature": "0x0c1eca27f612897f2e1f647929d2130b3b5dee5b3059489c0c1f9c9a4ed764a44204661efce4d8d77d7f8e888f9ad1acb5130430ac9a62df8b3b63b77fe9ad091c",
    "signer": "0xE5dE1D386bF717Ed8b141c490Ce0ABa4251eE554",
    "userId": "398183274"
  }
}