{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "399300",
    "entityType": "User",
    "nonce": "0xd5a91d1b97448cb04ba2eb5c3d19168422c3f517cb8f4246c3d8adf80dfb34dd",
    "signature": "0x91db0c8ee9b107032a5b9b4630aeed539cf676f80bf63ebb03c6ce652d5d9df871125b2c7cf8d628193a1bd8248fd0288d263869ea64362a28779dd7f2b09e921c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}