{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1881052",
    "entityType": "User",
    "nonce": "0x4627907b3b0b3b18c39e40995e59f3871ea152e0fdb0cfa11347f87cdc55445b",
    "signature": "0x821df48a56831c8b5c4a3ed813efeafa7b341288266997394e7f456b798e8d656c6f33c5afe684e0ef72209e252bbf9443304ef4e088f8b22c982c54d85929291c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}