{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "963075181",
    "entityType": "User",
    "nonce": "0xa880c2a3fb3df400148622a55df1aedb2507f7ad57b310e85ee5f4b7154bb27a",
    "signature": "0x590bc24de94ecb78dc52e73df3793d7c1a4442271bbea75c77d5dc4178c71e6b0f3a14970756ecd1ad2b7edb84b094241fbd50288ff2e6065daf5244013fd7291c",
    "signer": "0x5B83E7748cF8e414B76B16e39d629AA8deDB4616",
    "userId": "604013128"
  }
}