{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "278611500",
    "entityType": "User",
    "nonce": "0x158a371cc8c93ad452123d10370c264a46bf54e2d71e6d6ffb9b0461b3e69b39",
    "signature": "0x034c76a0cec17822259fbec23d66bcbc41797da99fedc032067a03b7849ead7e32a03af1b2aefe4d11d5542b505d1aa5a85f04d553b72fa46ba56590578c00331b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}