{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "400171089",
    "entityType": "User",
    "nonce": "0xe73966eda351eb092d9fb1fa52e72fcedf3ff1fe94e4830ef74d60b86eb689c1",
    "signature": "0x94447b05c8d5c60017f4c9080f3d09fe286c41f6be22d1c56f9775edf66bb5cd3b6eab69d4dec5784cae9deb67383a198d68328cac8834650829437f683dc6d71b",
    "signer": "0x721f076D6fdC57634d612324093cA69B47866867",
    "userId": "303348966"
  }
}