{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "376954",
    "entityType": "User",
    "nonce": "0xd409f45ac50b1f7c789af569e941849f91fa693b27972afc34f17ef8e1689cc9",
    "signature": "0x16864b77ebdcc183bd6f4292d0a2cd4a24579bd4699ab2894823e62eb437c74f24c54e046a0108ee5998c1ebb0d9bac70f6ec25c0157fcb7e4a73d5515dfd9181b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}