{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0xc19cdce9fd380f7800e7a49ae5bffbf1a088603b8fe75c65970db7da23669abe",
    "signature": "0x1d7345cbd5d57cc3837d935787856d7071d617bae9c4113c30a7c8dc8d8d2bdd238349879089b3c512002398b60e0ccd55088b4194845f695983906d81c6fa8c1b",
    "signer": "0x4dD8f87Fb57e57661Fc7F115acb4a0235f415ABA",
    "userId": "806547662"
  }
}