{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20673",
    "entityType": "User",
    "nonce": "0x4f7cf1b32d3ab5ced72bc214054d84ec96207b27b69815ccea32e1cf8c095c30",
    "signature": "0x8af66a9f9cb7c2f86cfe4d34a74347c8bb9a5cd084a6e4bc2bf34ef9e18f20760ce2d57ff6c107abaac8ca881bea1f04579266d286d4fa2ef9a1566507eec44a1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}