{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "590052416",
    "entityType": "User",
    "nonce": "0x885f7c39f05112c231f88945f76bc90c7f27737cdb3664eb6d7ee9771413f1f6",
    "signature": "0x7c970557ebd7d392a4cd552b6ce85a2b4f6d91b9f9584c04f57fa46e918e13503ec9e3557477e8cf5544f8b3b677c0e4831cdcafb0ea0a14fb145e84d99749451c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}