{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "152450",
    "entityType": "User",
    "nonce": "0xd219cbc6931d81768ebb16a71ef51c8632fd8d93c4d8ce8ccb05673c2a7f75b6",
    "signature": "0x93161d5e4284d065040f73916abfee0c29b9e0829566e37b99fb6fa6c698c6f818b31c41605d79baa7e094bd48e8edf8f381a99a107e6c4fb072dea948183dd81c",
    "signer": "0x57Ad6E2E3fFc5ABe9b5FE7DC3bF7c07c8cCf9Ccf",
    "userId": "571702334"
  }
}