{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "57803",
    "entityType": "User",
    "nonce": "0x30a7ed428cfbc71b4a704e2d96352992f2e063081b03e3f638847d4ac7455395",
    "signature": "0x5c904a3484075885da7d912584e1a66c31254129ead1a21effeeec9747d0a0642f3c6e8bfd8f26f355274f87706457cea4534fb44cf8db7c54fc0614e9cff87c1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}