{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x2894241bf7d4c26352dbc97bc3aaf06896f7f1466a5e6fbb7b8e276d3873d8ce",
    "signature": "0x1a8cb6df842296a0056bc453a6492f4712168911c152c3b4433b5c9ffc90a04263ecca86cf8e7b7052fd121fd02edf2642f82671fc2f00abce6bc1090f4659381c",
    "signer": "0x4B570b593F6485BC7F1ffD7095D30b966f32d3c3",
    "userId": "304470790"
  }
}