{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "874277249",
    "entityType": "User",
    "nonce": "0x550d6638930198008241dbc7d891d5d2f28eb9a2ae67b32454b183c885eb24b1",
    "signature": "0x90cf7cde212bbb259c9dc46277da1db0a6176b42ab7fc0ac4656f40624bb98df5956d76e238b324518905d1712e2c05a356fba5b1e39337e87cdf6cd14db39bc1c",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}