{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "303137",
    "entityType": "User",
    "nonce": "0x13088831b10d809de8c65800672d240b54e74aaa09d557ad7a24ebd0c2d9c676",
    "signature": "0xb5825423dc39b06e292ca31a5c8c028458e6bd58850c54d749ca2da9f8a5a63832f82a8295fff508d374b7561877f3bff3ebf571b3de9b0561b5f753b3881ad61c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}