{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "638733607",
    "entityType": "User",
    "nonce": "0x3aa6e68c355c10ec818fe91ccf271e02ed58d52a64021eb1a0523bbe15a7a863",
    "signature": "0x97c654619dbc6412b81dfa0cf0d824b0065dd7835d57d9cc412b782a76e594da32a02e799b21a7feab1a3a1239cf3b1ac4291e9f17f483b6b489e1ec578c37251c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}