{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "16830",
    "entityType": "User",
    "nonce": "0xa48b7aff8c40fb2d0bc055315583588191b1daf8069a9cea1a6ed3aea4ff3c88",
    "signature": "0xc38cd9192f91bd1e60ef8259fabcfa961cbf4e7b250025af95f05010e047f9a94831d1b1b3c3007c7ad076b3b39fc870a47488ea8ff08b9fe8dddfcc9fc70dcb1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}