{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "390728",
    "entityType": "User",
    "nonce": "0xb0b640f6e29af30309e85ae5f0e42405807b0ec710de08b3a821a7d4fafe8fbc",
    "signature": "0xe7d1343f7fa505a91a11b6dbbf5b7a20ff830c8c4618d10f3189df150a226e0f6480397e96d23931eb04d94410f45e850f157f389763514b98b0b9fa81f5521b1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}