{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "575269234",
    "entityType": "User",
    "nonce": "0xd861b44a329595ac6d76901cc7199b46e7b29c610fa3b4af82b5d7d2be6fc28c",
    "signature": "0xfeb64c5e257067cbdc6a6333295dd8e0220dfcf8e6094be55d66939d8f9247e737940e369b7bf9e4feeabff4b116c70dd9fdaa7386c3013b1731fe8319d74cc01c",
    "signer": "0x9b6bD4505e2bCfA88acc8680F463a96DAddf1d0d",
    "userId": "213208842"
  }
}