{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1688971",
    "entityType": "User",
    "nonce": "0xf55c1a7ff625ffe91dc3f87edd9a9584fff8362e1100377a143f996ad0a7eee9",
    "signature": "0xda1f0075c7f97c28c61e73a172ae24e0abedcc703cb98cd9bced2b17907f71a2671cabdd8199b26d40af1216e4a0b661c5c0677dafe6fd4c2c03fc1e678f1af71b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}