{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "154201",
    "entityType": "User",
    "nonce": "0xa9311e20fc1ef9c2560b47e607f388ae496dfbeac736d3c6a9af3bbdf4cc5911",
    "signature": "0x664546c79bd6606b7716c1a861a13067d9387b2f8c5f70601327fa206643b22411f524e8c3e38fc139323fb26e1e29929c8500e998eb1abe1e25bdc5eaef298e1b",
    "signer": "0x2599B6b130a50a36A35c1b3cA125B208B62E6e06",
    "userId": "680763603"
  }
}