{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "502706041",
    "entityType": "User",
    "nonce": "0xc96e7fb2d7f79a2fdb9f67bb5abd75c7c8b2340daefc5bf4272650675f49e72a",
    "signature": "0x53a0a708fcccc6a3cb0aa04b3e673ed6bbe340f9bff7d7429ac93dacb3a85c0e5f8d5e47f01fe7c528fb532d0d59809fc64127be07ad90c3a688f84c2c9234011b",
    "signer": "0xc925e3D5c81807Eb402BaF80F986fc737F7EfB5c",
    "userId": "230578654"
  }
}