{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "151338",
    "entityType": "User",
    "nonce": "0xc3bf752a69057d60087f20bf1d616723cf7a6dcbcc9c49f205dfbffd9d832798",
    "signature": "0x761890d4d3f50f95346aa4bebf336fa68377635d38a82c10b17bdb91107b55a83f8b2b25653a7bb8419472bd318708f78f2f56ca5f52a1d68defd194e6dc52bd1c",
    "signer": "0x306F12d5f97327a8099a74CdE3603214150d7e5e",
    "userId": "197430922"
  }
}