{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "600556383",
    "entityType": "User",
    "nonce": "0x939bb99a290dfa88d5ba8aabe689ec24d1be3a63b75b3473732254f71ce72ed6",
    "signature": "0x557d3cca6ca2c9f8bff8a756ccdd8e0971ab4dc86f81af254ac1919feea1a5a70badaf1720f1aa704933ea585142698e2f4fcef001728ea2c3cce7aa27d7c4031b",
    "signer": "0x9698A898Ed554B831a7BB69972E1B05eCC560430",
    "userId": "967510490"
  }
}