{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "257534016",
    "entityType": "User",
    "nonce": "0xd253ad1b9cffcc6233d4add8025d42f7cec157025da48b34da1689c2bbee9d28",
    "signature": "0xbf169c09dd06d973c9c723d676fd2c0b8ed42b3d411ddf4c88dd6bff8e29f6a22ea3fae25aa5d87fbf9dc300ca82ffad3ac1ce8baa17fcc133b3dffcfb7bf7bb1b",
    "signer": "0x4e00869251c3880cAceF0b2E19dd53Fa1102Fe12",
    "userId": "940136690"
  }
}