{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0x99ad3ddc7d068f2ab3435056bcc3aac24cf5b1a8888b8cb66c8de14c6c1206e9",
    "signature": "0x46e4a3f77ecb34012ce0735abbe8d89c6dad47e3c16faa9e5e855d9d680da7e50736ade62bd3789e180e1c0ad6abb281c10e7a7b4536c31470403d78ec559b631c",
    "signer": "0x6268f3F36E0fe8D3E139bC6d32d7539887721848",
    "userId": "418312750"
  }
}