{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd22709cb3bf623887e2cbf15bcd5e317f891a4de62393a97c4f5639a8ad534de",
    "signature": "0x83d2e105e4b4a31f9ad73c0c02bc22edba6f742d741b48b33b5f65f6fcb41e177b4e646201ab82cbffee5a5ba01f1c9fee0bf3f0951ebcdc3ccba1ba5127409d1c",
    "signer": "0x5d90Fbab543cAF0f8A684deE1B931b2CE08c661C",
    "userId": "434220751"
  }
}