{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "503764788",
    "entityType": "User",
    "nonce": "0xf7de8f4b57702da7f3a107fe2f878da1db8c51f2df4b51265c495d66c42eb1e5",
    "signature": "0xdac9b4a696f602b19aa99726197722fd040085e83ab8bc2e552f5c13ee28b91f71f06e57b468391446a068e6856327784b9df16b493c02cf80d913917590ae891b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}