{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "339752",
    "entityType": "User",
    "nonce": "0x3a1da50c8749cfc821fb6cbe995422afa55524ffc745b79ccec2e7c70562bb1b",
    "signature": "0x39f748808822e1179a5524d1419d8b64c089bc5506bcce39a8942a815addd93a4fe62a965299bce2164aa1e93163def4ccb5ddcbc72018ee5c8364a12f7dcdd91c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}