{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "510637",
    "entityType": "User",
    "nonce": "0x4c843e967c867e2ca8743c49a2fc13db422e32dda7cc2a39a6c3a2d71775f73f",
    "signature": "0x4cd8bdc1bb00e35a308ed8ec40739c88757fbe0a3e619a499833592b7b55cce4648c24ddc2140d7c67da0e26eda830f32a038213884b93fbcf3aa1d9efb27ac11b",
    "signer": "0x646BEca96ab04bFb6DD725EEBc0383e1Ef13deeE",
    "userId": "588448440"
  }
}