{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd4fb72e281273e0fd162963d2d644b2aabfe248d34ae6bc464e866c464780399",
    "signature": "0x2211b31a9b269e1d10d4c157ab2fabafcc2b8575a141a5b0409e43f448877e6d71d871a3e417e25abf037a88ebf566125e2ed6940c3eb7279defce599136000a1c",
    "signer": "0x90F810aa7C6F2872852a480c02fAd7F6d048bcf6",
    "userId": "757239268"
  }
}