{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "216427183",
    "entityType": "User",
    "nonce": "0xb21d192f16ea99064b156d58436d622cef2da1f06dfa30c79e5ecd5b46dd14b5",
    "signature": "0xdd75fb14aebe748f2e903f583d3b5ceca73c2034c161e68a99bf3a57d155cdaa18b477c3b066e7f9147d05f19b649da857fb1f6d369064d1dacc8f692617d93e1b",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}