{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "719504415",
    "entityType": "User",
    "nonce": "0x923075c14fa3f30113e2f37204e69cc94b715a3cfd3c522de8c60b387424d2c3",
    "signature": "0xebf751d3c394ac55bf8d2f87f091f625b72f4f31fdaba7c35877dcdff99acf7613778c1c1b34763b1334fad2e1c764d0218079a5a10bbdb09e78de472e9b15971c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}