{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb8a71598e31052b723ce6a28bc9b78276fa34549939bc4c9b0646890628cbcac",
    "signature": "0xe9e72df2ed2a5bfb679a4942b205a3929076e4cf28e5934c4ea3bd7af1e15dfd29833a0378d5f79e6d36d0b0eaf9f30d07facd5f54b8baa16b0ded40c268e3ce1b",
    "signer": "0x4cB6E3a04248eEDa6Ce4f2a95AE4eF131b35fBE9",
    "userId": "504430901"
  }
}