{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4198",
    "entityType": "User",
    "nonce": "0x309693fb234b23c6d9d2e5c2740011bfe692d00f9ce9a1856fad78afa44b05e7",
    "signature": "0x39ab30932eede8fde0cab2918e3c4a92c88982ab3c455db9e947a462133b1f7321436d04cdcb0c1a4ffa8c0948f843249bcb3d791b65f0baf043c4300f1ea3001b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}