{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x81c4667f6a74d759c6524b909f6539c0e1e878940e66c30f77adf91db1b0ef9c",
    "signature": "0x01ec19b5b4122b125f1c5199bf5141d5eb0f9461395cf02985a93f64acbf00207c450ef52eba0b59582cea9c978fd1c3d7779e48586355f100bcfcf472a17b3c1c",
    "signer": "0x99FC58b9AbbC0C373045aaAE3Ca68Ac6e5b586f8",
    "userId": "590830414"
  }
}