{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "600556383",
    "entityType": "User",
    "nonce": "0xcf701ead84e825f29caa5981b1b616f2c1ca3146f63f5d4b151f1a6d8e038fd9",
    "signature": "0x3aff81fd2ee367a72cfd25310ea30bb4d99171abbe7522d2276169fa8c17e18f24787f82e2940966c84ac857ee2ba7d51d99df9d4822fa6f6337dbedeb138c551b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}