{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1337",
    "entityType": "User",
    "nonce": "0x5d8ea21e5888bb3c058479f21186e1afa238140db158f85f640d6cb207378267",
    "signature": "0x4122d17038d682e2ab75fb4cd00e2546cf68ec6fae1110454621ced1ddeecd8f5666ff9110bd7c1162edcda4b24d1c263d25e1b323a610ebe1a149bf670c23031c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}