{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "977815577",
    "entityType": "User",
    "nonce": "0xca2507dbcb67a3ca179b36f6c7a401e7867fae3b7dd1f23c6a638d68e97ca6ae",
    "signature": "0xff9f61c39ef996b29e5344ca120f4c267d81b644c9b582bc1731c38699d6bd0e1c39962200ed912e9fb85b7e0cd2de33e296613c39a7fcc4a83d06486151fe731b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}