{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "901870302",
    "entityType": "User",
    "nonce": "0x67eb3b9fc2695f25753f4842bbc542ebd9636cd24ef9f7a2c0837809573ab032",
    "signature": "0x7521cdca5a6f2bf7f2df82d0a976d133890fb4c064a56bc753d42dcf0daf7aee0d77340911a4a5dfcdcf52b6bc943b0c5af54f1e69b0ed2f73b6228e1cd0a7411c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}