{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "557210595",
    "entityType": "User",
    "nonce": "0x2cf804fbb3f75b764c18aabe864a64f67091d1a8a3a1f545c62bbf047316c4f2",
    "signature": "0x20e9851ae8d0646f1c36a404913f70649bb07c6957b064b4e5c6f9d57ac7054b69da7ecf277f5f55a7e56aedf1302234f7e5d9a5e247b5ad1819094bc78d3a051c",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}