{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "150712",
    "entityType": "User",
    "nonce": "0xf169559b535a3403bdde660d3084ab96e628af8c68e29753944aa78f873fcca6",
    "signature": "0x3f44c8ee25eed1a29a7bd5e92563c2af415e43bc17e70a99856bcc935333b9634a59668f05bf2f4291311f63b41edab439ea9f76021f5863bf6476830db157071c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}