{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x371779165b8fb0f8b176a2c8879a4d8e6ea72a51089d8d2f8f8b220196a65f3f",
    "signature": "0x4cc399f018982931160cf1883c3301f8c87b657799f8da3788c6830c6e3c2b5b688439961ffe4e29e3174af29092c79cfea6ff7a141b67a5f4dae4af59478c381c",
    "signer": "0x0FFf69aAa5C477973508e64c5cC9E5948d1Dc65a",
    "userId": "901483974"
  }
}