{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x15dd9685ba35af42bf56fc2c79a5e4a0acd405e215800aedf453d14d6e5dc115",
    "signature": "0xe90ec0c8fbf136ce44754f3c4f607de6855f5190c46a236f6023c330d73cee5e28e720a833e061abd7af72b320d73e4cb7a02c349ea1e1063d4f6546755ed1a51b",
    "signer": "0x4b1189bC8Aee2eb6CeD0578e2f69157Ae9DeC090",
    "userId": "67696412"
  }
}