{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x139ee5f20bdf08940114d45aaf2b40dfe65d78c5a675cfe89d086577c218473f",
    "signature": "0x339aa672033ae7afbc42e7017014c04a1ab05bd083b95a894b83c00431a632c1391c2d2a4440b1c9240099d2753230180edc2b1b7f226cb25c2e6feb17866c771b",
    "signer": "0x54cE4D8C204AF853B50f4091206A9ed1905EAb6c",
    "userId": "228972129"
  }
}