{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "900066767",
    "entityType": "User",
    "nonce": "0x92ae9e5a90b0709becb7a0245f9613e8730cdc822c06606cb87f341429c2887a",
    "signature": "0x786146e01a1a0e09ea7d8bbb3edcda8e7665990842dbba2c2596f9968cb68b4e31a107d387fd63c26e25cd37b5bc10071a58a3da7467d1a54d1cb9be5332fa1e1c",
    "signer": "0xa57b4357994d735DB3Db20349Ac21e880472e94D",
    "userId": "521443517"
  }
}