{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "648443373",
    "entityType": "User",
    "nonce": "0x04c68ca806f956ff1ff07dceaa819ffbc0b450f5f069920b3202b88494b5d5ec",
    "signature": "0xb1ddd48f3d6ef44ea4f2200812235bce69162056746aa3f796ec273b90110ea52639faa224c5450e9b3563d1205311180c99940bea6b33d8094ec832a2832af61c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}