{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "296519",
    "entityType": "User",
    "nonce": "0x9ac21cb21447957513258047b53555985c7932b82b0acdda8b1623f86a3db8d9",
    "signature": "0x6dd5a05397c9533aa8ab2b1daee43bda3351a453dc18d2a2da8ab5b0183ecc7c5924a93f6afc4d193d34f4c0eeedfd1334c212778bff7f5b2afd8e03cf8e84d31b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}