{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd94dfd76d253bc034fb067201d468bc3d189d17221a934820d81cd1b53c0da1d",
    "signature": "0x520d72ec3191b1660db85ba15f6c7a488e85cbf6eb65e01d5b1c1892eea0179e04a8c949fb4357ace45d18cb8d6194481ce9d4d0d2690b59a864eeb0a8bdeb5f1c",
    "signer": "0x3F05f5674F6511918AeC7aEFb0CeAb60E47C617D",
    "userId": "710954975"
  }
}