{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "8520",
    "entityType": "User",
    "nonce": "0xfbe7d4d287b76e945e1ec953150a6627600ccd800a8245692dfe42c29563ce61",
    "signature": "0x7506caf469513f821e306d79baa46a560c08080b07ec4b2f888f69ce81a4dfc955ca0ab745094666cdd4489a3dead88d84a81171d37f0329722dbb6c0c4f20261c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}