{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "643064421",
    "entityType": "User",
    "nonce": "0xdf308feb6e8263c5d965ccafea5afd02990f600cef638af7618ed9aa5ba98195",
    "signature": "0x41472ab5f32cb74d4f736a03e08bcd28beb5c25cb6f3def4c718b1d12d44bd346845f65acd8819f51f9a2474a3a905f8cf833bb79bd0f7b23ce082b66283b5b11c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}