{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x663874faed12908d23c28bb0fb5b8485856d1029062eb42cd313c130589d0fcd",
    "signature": "0x7428f2a09f8c138e809ae73083b33bd0f462f757ce90b670d7774cc14982f43a538c863b0437e546f1ee3f401968263ca3d7fac2fe5fbf87ee01799c5ada57dc1b",
    "signer": "0xd6B54c8Ae60b61347E891451334679DD1B3E373e",
    "userId": "504702805"
  }
}