{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16521293",
    "entityType": "User",
    "nonce": "0x100c6f888f7f8ca676ab0394f30498fbc94cd41e43b4de60bd844d5268d3013d",
    "signature": "0xedb2a19bb88be40d7a25e51a38c57887470933a5e95eba87f9cdabd580fd42ed47a7fedd8ce98abd0f77e5635e60aa7f0f459798116ba8b85f0396085fccaa6b1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}