{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4f4f3159827cdc4fc7b075531226923603f2af3314cb77ea87818dd47f376a56",
    "signature": "0x47d61978183f40a2119278da6297e744fac08365206cc318f4737f215cd7f76b1704997041b5705fecf8ac6b1c0b051d4f896eba53e72f5fd5460b271ac6aec11b",
    "signer": "0xC4f9728E11607F95d004ba9a5425762d5558Db66",
    "userId": "853983614"
  }
}