{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "490857348",
    "entityType": "User",
    "nonce": "0x9bcfa54a2e93b6aedb5459729b93250a65a91558cd2b4175e56282e3e1d6b29c",
    "signature": "0xe072359f45604d66ff62005ec9c4b643db6bebc9e0f94fdee171c2f20d1cbecc57368ed742705cf14f809a15b939580fc9bb25d72134aaa21d411b9c4fbbb2271c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}