{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "30121",
    "entityType": "User",
    "nonce": "0x399c134c630e823f383e3f3722a74ad0a7756ce66475d85045cba7f0603fc4e4",
    "signature": "0xb05de1e3922610b24d0215580f785df6974f34b612ec7726adada8552f252f9e29c4a7a0adfc272b54473dcc8bd6311048ac9483d369997526fba98ad164eddd1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}