{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6229b94bf723f71a02a2574c6cde8393ab6d69bb235ee9a16ba9a7e2b9b7e80c",
    "signature": "0x48af52c988b3eb2733570e20dd7051748969c90c604bd0090c0a7796b5b206556e3e3168d42ee6b5f44272f01c0c0b42c5e478b58e1f9293f7c35ee52e9d06e61b",
    "signer": "0x64B0DA55A684D51d3EF114Fe644eac7db132fDb7",
    "userId": "121304325"
  }
}