{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x5287408dea43726c5bbafb5be820a4c28f2d28cdc2fa6e8c203b60099960f901",
    "signature": "0x2b0e8c4134fadfb9e6507b0d567b0ab558a0b46fe0b9ea2ec11646eaddbe51d23469511c6e2b2de6fb3225e2560de282bd0d529a67578c398680edb7fd74d64f1b",
    "signer": "0x66c4A758AF5CdCB0E219F5F173De30381B5C594C",
    "userId": "550340113"
  }
}