{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x13990f5015dfc90d568bd72fe61d421037eaf6638ca2203ef88fccf55eb185e4",
    "signature": "0x4f63ef95d999ca2579475121b86bed401e71a8f83efba69d3312ad6787bcbcac0b3a8193cee3d428bedaf229e2eff6d2ad0d1f3110374a8e040132f7647ef8a31b",
    "signer": "0x85c938ac05d0E194f7347ebf59d3C76d7D7a9868",
    "userId": "51640517"
  }
}