{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8b78d07065b5924c03e8b5206b399a4200fd881e59f18ee12500366879671581",
    "signature": "0xfedaec018f4c01ddbd3028ef36c9d3ddda1c4b3701097de4db4770a13296e14510aa85a08c6b70d2e99a48a86dc45dabca7cc58fad3f4d09a4cdd73522b81b7f1b",
    "signer": "0xEBB63E049104E4172d1b2089778ED9cAd69DafD5",
    "userId": "666831242"
  }
}