{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x485f55940e3c9d1db8b6881f19134dd84583f33bc97e88cce00c7d1ddaef9584",
    "signature": "0xa00d01701807ca6d67b340178accba38657af8ef65c6174deb2346908745227a514501380268a875a2dfd68f4f4d9c05aa57a24c637830e6c5b9b9dc0da544471c",
    "signer": "0x09f046A8196b7968152f3e74b299DBCAE43abF66",
    "userId": "21345399"
  }
}