{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "515388277",
    "entityType": "User",
    "nonce": "0x37216f592b820413099397d3e597533dbcbfbf8d973da9f82e70c7f719b7111a",
    "signature": "0x3ef4850e037b344cf7a80bed159ac95c80c4cd1655d6685433709452147cff22352bf076e89dcd7a94460e4a7318cf312aa323e0293794db1ee1d2a2b8e1cc771b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}