{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "550101899",
    "entityType": "User",
    "nonce": "0xeb5fc6b1eb9e16629fc7d9285f04a4a6182371f17155cc8b6093631f03c35a13",
    "signature": "0x9ed7ce46ed61426a1b37724ec9955885441af96d298b0f365b7eb25bfff319486d6d1e843cc724690abed3790d7a0e95a5374dc0b0ba06f22abe1998c5ad21ca1b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}