{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "728570067",
    "entityType": "User",
    "nonce": "0x65545c4afd484af4ecf71cae4fc6c169ba6deb6cb4fc61ba6986096b1be91e1e",
    "signature": "0xb2aa247ecaa242af9ab31ce845b8453b86697d75f868555b32d6869f4946a432087623c3e2aa39bb09545eff14692be36cf5c90417077a9865a2fcd01b34cea61c",
    "signer": "0xFe4E972E3ec8D8d619816F5644f74CB5bA1B01b1",
    "userId": "219239808"
  }
}