{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf90b4986faaebc4d98e2d2bcd83e2b34542648db3311b28282b5b3846350e84b",
    "signature": "0x856e3858d5ed539cd9519aa56b906cfdf8d95078a68fca88efeb63b8d8d36c71267c3de19a473a0a95f0fa7992e116120e4a3a9285bd26c4e87f727b79e69cf01c",
    "signer": "0x7D0D1f2Ef267c446EC5B8223F3a6b33B0cE7601E",
    "userId": "81709271"
  }
}