{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "12375",
    "entityType": "User",
    "nonce": "0x69cf9b80354760fd96cc7fc33115e8d752a06478110ee5d34440ac4d7b597934",
    "signature": "0x32c2189121a868e4c3dccc02fa551fdf071a47eb1a150e85f3d61619b6605d880c64eeb6d2a52226250c0d9477b9e5afc2f983278815400402a477aa14234a091b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}