{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9e39e10692ec49b9a80ccec6a0ba0119b0586a54222f0d00cca6447eefc65104",
    "signature": "0x2bbbfd855a1df26c6ecf54aeab1cf29d7a8df9c0164fefecf58b5e6f2519731236cd16e07970a632277b45de7806f14c6597023b64f36a68a2838d9ba00518481b",
    "signer": "0x45dd4B563AbeCaB329e918D13925cDdFBca768C3",
    "userId": "265042309"
  }
}