{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508186998",
    "entityType": "User",
    "nonce": "0x99830cfce66eda8817f3249af49cb2b9ef9725faec8bd3f7e8da59bbeac9fb95",
    "signature": "0x03bd5c930400715604d74ca3ed1b9a46be3340cd003011408d145959db6543e3610c078fdc9949344d9cdc6ccc41666161d39166a97a509651f5490110c7f7341b",
    "signer": "0x134f5c1f8716402474824c6A0AE855af1E3053eB",
    "userId": "462352719"
  }
}