{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "393875387",
    "entityType": "User",
    "nonce": "0x49ab41239e01a942316fa8ec13d77763ae0b2876f00bb7cdf7a17329d2311924",
    "signature": "0x56a881fc8b77b058d9a74d84379e9d78b2d92a902bf6117bcff9e8968a7c13b34f7b4669926338124c929c4697e38dc0693bec78e430a581c8378b61fd9e722d1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}