{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4f081cf9eadd5ddf604bde6b5b37d1e634aa878b2e6607c3e18a6efbcebed64c",
    "signature": "0xe844bd39c4402dfbd3a747cb2fdd8adc6efb278e53b285f0c5310e0d6de675445d28bbadcea2a11b44957069180875efc17684198d45a8fdd7957167c10aa3781b",
    "signer": "0x67643F9FD6FC62453f7BE31F8f414A602Cb1d074",
    "userId": "457352287"
  }
}