{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0xa314edaa4a4e1acb34d8d32ee7f5cd3fa1e8bf57ec3dee8e13730869159493bd",
    "signature": "0x46fc182150349707ad031a1d456f2f0aa40ac64cb05321c6c96a06a928b318a65b6f3043d93039d7a06e9b751f08239f84d3a923acc23483ca317e217dc58e241b",
    "signer": "0x4950A7c498b6c214e83B79502162b7f248f9e6ed",
    "userId": "499895630"
  }
}