{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54122",
    "entityType": "User",
    "nonce": "0xc5f4261b48a088ebb4647e9e64224680684485694b439e7ae1989b41cc0274d0",
    "signature": "0xaa210e29938ae50a84caed5837af2c360e92a9dc7c32de47a3d9ec6aa32dd63e78572a2ae7dc4d3890a8475c441a31a0b10eea6ff9fa4d8b0ef63cccf9e3c97b1c",
    "signer": "0x474B8467757bEdBa76afC2394cfCb801C991B143",
    "userId": "815537464"
  }
}