{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "300991",
    "entityType": "User",
    "nonce": "0xf01c796e2078c1560c4ea34f8afa5c5e4f8edae59c4a4d8ec3b0bc3bc5f137b9",
    "signature": "0x8c1294cba051c8181d28bdd50d280467fd22c40dc1598e7e862d9cb55bc4dc5344b8747700e37509439a420c16e2fb4e280607778a7fb36dccff685b725a5bff1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}