{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "867345408",
    "entityType": "User",
    "nonce": "0x57c9a3f319756212a99366eec9df89edcaf438b1e323142faf0760edbd2de780",
    "signature": "0xac5310f52f5e8040560b2e0b7c226bdc180bbddf695e1e9ea9547b5154625092528f4dd42b97b0ebacb46362a0e1cef5fce3b4c32bf2d969532e58f21358570d1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}